mirror of
https://github.com/MaSzyna-EU07/maszyna.git
synced 2026-03-22 15:05:03 +01:00
775 lines
26 KiB
C++
775 lines
26 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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#include "stdafx.h"
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#include "scenenode.h"
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#include "model3d.h"
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#include "renderer.h"
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#include "logs.h"
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#include "sn_utils.h"
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// stores content of the struct in provided output stream
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void
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lighting_data::serialize( std::ostream &Output ) const {
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sn_utils::s_vec4( Output, diffuse );
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sn_utils::s_vec4( Output, ambient );
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sn_utils::s_vec4( Output, specular );
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}
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// restores content of the struct from provided input stream
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void
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lighting_data::deserialize( std::istream &Input ) {
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diffuse = sn_utils::d_vec4( Input );
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ambient = sn_utils::d_vec4( Input );
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specular = sn_utils::d_vec4( Input );
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}
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namespace scene {
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// stores content of the struct in provided output stream
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void
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bounding_area::serialize( std::ostream &Output ) const {
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// center
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sn_utils::s_dvec3( Output, center );
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// radius
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sn_utils::ls_float32( Output, radius );
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}
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// restores content of the struct from provided input stream
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void
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bounding_area::deserialize( std::istream &Input ) {
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center = sn_utils::d_dvec3( Input );
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radius = sn_utils::ld_float32( Input );
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}
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// sends content of the struct to provided stream
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void
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shape_node::shapenode_data::serialize( std::ostream &Output ) const {
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// bounding area
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area.serialize( Output );
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// visibility
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sn_utils::ls_float64( Output, rangesquared_min );
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sn_utils::ls_float64( Output, rangesquared_max );
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sn_utils::s_bool( Output, visible );
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// material
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sn_utils::s_bool( Output, translucent );
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// NOTE: material handle is created dynamically on load
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sn_utils::s_str(
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Output,
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( material != null_handle ?
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GfxRenderer.Material( material ).name :
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"" ) );
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lighting.serialize( Output );
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// geometry
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sn_utils::s_dvec3( Output, origin );
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// NOTE: geometry handle is created dynamically on load
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// vertex count, followed by vertex data
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sn_utils::ls_uint32( Output, vertices.size() );
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for( auto const &vertex : vertices ) {
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gfx::basic_vertex(
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glm::vec3{ vertex.position - origin },
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vertex.normal,
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vertex.texture )
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.serialize( Output );
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}
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}
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// restores content of the struct from provided input stream
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void
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shape_node::shapenode_data::deserialize( std::istream &Input ) {
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// bounding area
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area.deserialize( Input );
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// visibility
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rangesquared_min = sn_utils::ld_float64( Input );
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rangesquared_max = sn_utils::ld_float64( Input );
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visible = sn_utils::d_bool( Input );
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// material
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translucent = sn_utils::d_bool( Input );
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auto const materialname { sn_utils::d_str( Input ) };
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if( false == materialname.empty() ) {
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material = GfxRenderer.Fetch_Material( materialname );
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}
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lighting.deserialize( Input );
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// geometry
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origin = sn_utils::d_dvec3( Input );
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// NOTE: geometry handle is acquired during geometry creation
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// vertex data
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vertices.resize( sn_utils::ld_uint32( Input ) );
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gfx::basic_vertex localvertex;
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for( auto &vertex : vertices ) {
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localvertex.deserialize( Input );
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vertex.position = origin + glm::dvec3{ localvertex.position };
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vertex.normal = localvertex.normal;
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vertex.texture = localvertex.texture;
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}
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}
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// sends content of the class to provided stream
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void
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shape_node::serialize( std::ostream &Output ) const {
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// name
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sn_utils::s_str( Output, m_name );
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// node data
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m_data.serialize( Output );
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}
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// restores content of the node from provided input stream
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shape_node &
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shape_node::deserialize( std::istream &Input ) {
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// name
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m_name = sn_utils::d_str( Input );
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// node data
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m_data.deserialize( Input );
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return *this;
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}
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// restores content of the node from provided input stream
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shape_node &
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shape_node::import( cParser &Input, scene::node_data const &Nodedata ) {
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// import common data
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m_name = Nodedata.name;
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m_data.rangesquared_min = Nodedata.range_min * Nodedata.range_min;
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m_data.rangesquared_max = (
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Nodedata.range_max >= 0.0 ?
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Nodedata.range_max * Nodedata.range_max :
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std::numeric_limits<double>::max() );
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std::string token = Input.getToken<std::string>();
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if( token == "material" ) {
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// lighting settings
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token = Input.getToken<std::string>();
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while( token != "endmaterial" ) {
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if( token == "ambient:" ) {
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Input.getTokens( 3 );
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Input
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>> m_data.lighting.ambient.r
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>> m_data.lighting.ambient.g
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>> m_data.lighting.ambient.b;
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m_data.lighting.ambient /= 255.f;
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m_data.lighting.ambient.a = 1.f;
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}
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else if( token == "diffuse:" ) {
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Input.getTokens( 3 );
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Input
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>> m_data.lighting.diffuse.r
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>> m_data.lighting.diffuse.g
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>> m_data.lighting.diffuse.b;
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m_data.lighting.diffuse /= 255.f;
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m_data.lighting.diffuse.a = 1.f;
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}
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else if( token == "specular:" ) {
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Input.getTokens( 3 );
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Input
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>> m_data.lighting.specular.r
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>> m_data.lighting.specular.g
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>> m_data.lighting.specular.b;
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m_data.lighting.specular /= 255.f;
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m_data.lighting.specular.a = 1.f;
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}
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token = Input.getToken<std::string>();
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}
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token = Input.getToken<std::string>();
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}
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// assigned material
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m_data.material = GfxRenderer.Fetch_Material( token );
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// determine way to proceed from the assigned diffuse texture
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// TBT, TODO: add methods to material manager to access these simpler
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auto const texturehandle = (
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m_data.material != null_handle ?
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GfxRenderer.Material( m_data.material ).texture1 :
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null_handle );
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auto const &texture = (
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texturehandle ?
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GfxRenderer.Texture( texturehandle ) :
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opengl_texture() ); // dirty workaround for lack of better api
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bool const clamps = (
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texturehandle ?
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texture.traits.find( 's' ) != std::string::npos :
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false );
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bool const clampt = (
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texturehandle ?
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texture.traits.find( 't' ) != std::string::npos :
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false );
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// remainder of legacy 'problend' system -- geometry assigned a texture with '@' in its name is treated as translucent, opaque otherwise
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if( texturehandle != null_handle ) {
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m_data.translucent = (
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( ( texture.name.find( '@' ) != std::string::npos )
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&& ( true == texture.has_alpha ) ) ?
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true :
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false );
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}
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else {
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m_data.translucent = false;
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}
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// geometry
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enum subtype {
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triangles,
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triangle_strip,
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triangle_fan
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};
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subtype const nodetype = (
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Nodedata.type == "triangles" ? triangles :
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Nodedata.type == "triangle_strip" ? triangle_strip :
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triangle_fan );
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std::size_t vertexcount{ 0 };
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world_vertex vertex, vertex1, vertex2;
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do {
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Input.getTokens( 8, false );
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Input
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>> vertex.position.x
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>> vertex.position.y
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>> vertex.position.z
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>> vertex.normal.x
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>> vertex.normal.y
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>> vertex.normal.z
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>> vertex.texture.s
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>> vertex.texture.t;
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// clamp texture coordinates if texture wrapping is off
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if( true == clamps ) { vertex.texture.s = clamp( vertex.texture.s, 0.001f, 0.999f ); }
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if( true == clampt ) { vertex.texture.t = clamp( vertex.texture.t, 0.001f, 0.999f ); }
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// convert all data to gl_triangles to allow data merge for matching nodes
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switch( nodetype ) {
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case triangles: {
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if( vertexcount == 0 ) { vertex1 = vertex; }
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else if( vertexcount == 1 ) { vertex2 = vertex; }
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else if( vertexcount >= 2 ) {
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if( false == degenerate( vertex1.position, vertex2.position, vertex.position ) ) {
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m_data.vertices.emplace_back( vertex1 );
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m_data.vertices.emplace_back( vertex2 );
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m_data.vertices.emplace_back( vertex );
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}
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else {
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ErrorLog(
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"Bad geometry: degenerate triangle encountered"
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+ ( m_name != "" ? " in node \"" + m_name + "\"" : "" )
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+ " (vertices: " + to_string( vertex1.position ) + " + " + to_string( vertex2.position ) + " + " + to_string( vertex.position ) + ")" );
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}
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}
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++vertexcount;
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if( vertexcount > 2 ) { vertexcount = 0; } // start new triangle if needed
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break;
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}
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case triangle_fan: {
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if( vertexcount == 0 ) { vertex1 = vertex; }
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else if( vertexcount == 1 ) { vertex2 = vertex; }
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else if( vertexcount >= 2 ) {
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if( false == degenerate( vertex1.position, vertex2.position, vertex.position ) ) {
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m_data.vertices.emplace_back( vertex1 );
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m_data.vertices.emplace_back( vertex2 );
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m_data.vertices.emplace_back( vertex );
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vertex2 = vertex;
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}
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else {
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ErrorLog(
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"Bad geometry: degenerate triangle encountered"
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+ ( m_name != "" ? " in node \"" + m_name + "\"" : "" )
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+ " (vertices: " + to_string( vertex1.position ) + " + " + to_string( vertex2.position ) + " + " + to_string( vertex.position ) + ")" );
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}
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}
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++vertexcount;
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break;
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}
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case triangle_strip: {
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if( vertexcount == 0 ) { vertex1 = vertex; }
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else if( vertexcount == 1 ) { vertex2 = vertex; }
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else if( vertexcount >= 2 ) {
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if( false == degenerate( vertex1.position, vertex2.position, vertex.position ) ) {
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// swap order every other triangle, to maintain consistent winding
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if( vertexcount % 2 == 0 ) {
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m_data.vertices.emplace_back( vertex1 );
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m_data.vertices.emplace_back( vertex2 );
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}
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else {
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m_data.vertices.emplace_back( vertex2 );
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m_data.vertices.emplace_back( vertex1 );
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}
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m_data.vertices.emplace_back( vertex );
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vertex1 = vertex2;
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vertex2 = vertex;
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}
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else {
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ErrorLog(
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"Bad geometry: degenerate triangle encountered"
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+ ( m_name != "" ? " in node \"" + m_name + "\"" : "" )
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+ " (vertices: " + to_string( vertex1.position ) + " + " + to_string( vertex2.position ) + " + " + to_string( vertex.position ) + ")" );
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}
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}
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++vertexcount;
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break;
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}
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default: { break; }
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}
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token = Input.getToken<std::string>();
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} while( token != "endtri" );
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return *this;
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}
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// imports data from provided submodel
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shape_node &
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shape_node::convert( TSubModel const *Submodel ) {
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m_name = Submodel->pName;
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m_data.lighting.ambient = Submodel->f4Ambient;
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m_data.lighting.diffuse = Submodel->f4Diffuse;
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m_data.lighting.specular = Submodel->f4Specular;
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m_data.material = Submodel->m_material;
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m_data.translucent = ( true == GfxRenderer.Material( m_data.material ).has_alpha );
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// NOTE: we set unlimited view range typical for terrain, because we don't expect to convert any other 3d models
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m_data.rangesquared_max = std::numeric_limits<double>::max();
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if( Submodel->m_geometry == null_handle ) { return *this; }
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int vertexcount { 0 };
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std::vector<world_vertex> importedvertices;
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world_vertex vertex, vertex1, vertex2;
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for( auto const &sourcevertex : GfxRenderer.Vertices( Submodel->m_geometry ) ) {
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vertex.position = sourcevertex.position;
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vertex.normal = sourcevertex.normal;
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vertex.texture = sourcevertex.texture;
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if( vertexcount == 0 ) { vertex1 = vertex; }
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else if( vertexcount == 1 ) { vertex2 = vertex; }
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else if( vertexcount >= 2 ) {
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if( false == degenerate( vertex1.position, vertex2.position, vertex.position ) ) {
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importedvertices.emplace_back( vertex1 );
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importedvertices.emplace_back( vertex2 );
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importedvertices.emplace_back( vertex );
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}
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// start a new triangle
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vertexcount = -1;
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}
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++vertexcount;
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}
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if( true == importedvertices.empty() ) { return *this; }
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// assign imported geometry to the node...
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m_data.vertices.swap( importedvertices );
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// ...and calculate center...
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for( auto const &vertex : m_data.vertices ) {
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m_data.area.center += vertex.position;
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}
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m_data.area.center /= m_data.vertices.size();
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// ...and bounding area
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double squareradius { 0.0 };
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for( auto const &vertex : m_data.vertices ) {
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squareradius = std::max(
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squareradius,
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glm::length2( vertex.position - m_data.area.center ) );
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}
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m_data.area.radius = std::max(
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m_data.area.radius,
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static_cast<float>( std::sqrt( squareradius ) ) );
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return *this;
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}
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// adds content of provided node to already enclosed geometry. returns: true if merge could be performed
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bool
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shape_node::merge( shape_node &Shape ) {
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if( ( m_data.material != Shape.m_data.material )
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|| ( m_data.lighting != Shape.m_data.lighting ) ) {
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// can't merge nodes with different appearance
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return false;
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}
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// add geometry from provided node
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m_data.area.center =
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interpolate(
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m_data.area.center, Shape.m_data.area.center,
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static_cast<double>( Shape.m_data.vertices.size() ) / ( Shape.m_data.vertices.size() + m_data.vertices.size() ) );
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m_data.vertices.insert(
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std::end( m_data.vertices ),
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std::begin( Shape.m_data.vertices ), std::end( Shape.m_data.vertices ) );
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// NOTE: we could recalculate radius with something other than brute force, but it'll do
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compute_radius();
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return true;
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}
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// generates renderable version of held non-instanced geometry in specified geometry bank
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void
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shape_node::create_geometry( gfx::geometrybank_handle const &Bank ) {
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gfx::vertex_array vertices; vertices.reserve( m_data.vertices.size() );
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for( auto const &vertex : m_data.vertices ) {
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vertices.emplace_back(
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vertex.position - m_data.origin,
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vertex.normal,
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vertex.texture );
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}
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m_data.geometry = GfxRenderer.Insert( vertices, Bank, GL_TRIANGLES );
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std::vector<world_vertex>().swap( m_data.vertices ); // hipster shrink_to_fit
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}
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// calculates shape's bounding radius
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void
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shape_node::compute_radius() {
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auto squaredradius { 0.0 };
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for( auto const &vertex : m_data.vertices ) {
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squaredradius = std::max(
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squaredradius,
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glm::length2( vertex.position - m_data.area.center ) );
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}
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m_data.area.radius = static_cast<float>( std::sqrt( squaredradius ) );
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}
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// sends content of the struct to provided stream
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void
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lines_node::linesnode_data::serialize( std::ostream &Output ) const {
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// bounding area
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area.serialize( Output );
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// visibility
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sn_utils::ls_float64( Output, rangesquared_min );
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sn_utils::ls_float64( Output, rangesquared_max );
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sn_utils::s_bool( Output, visible );
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// material
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sn_utils::ls_float32( Output, line_width );
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lighting.serialize( Output );
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// geometry
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sn_utils::s_dvec3( Output, origin );
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// NOTE: geometry handle is created dynamically on load
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// vertex count, followed by vertex data
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sn_utils::ls_uint32( Output, vertices.size() );
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for( auto const &vertex : vertices ) {
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gfx::basic_vertex(
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glm::vec3{ vertex.position - origin },
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vertex.normal,
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vertex.texture )
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.serialize( Output );
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}
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}
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// restores content of the struct from provided input stream
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void
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lines_node::linesnode_data::deserialize( std::istream &Input ) {
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// bounding area
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area.deserialize( Input );
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// visibility
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rangesquared_min = sn_utils::ld_float64( Input );
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rangesquared_max = sn_utils::ld_float64( Input );
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visible = sn_utils::d_bool( Input );
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// material
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line_width = sn_utils::ld_float32( Input );
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lighting.deserialize( Input );
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// geometry
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origin = sn_utils::d_dvec3( Input );
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// NOTE: geometry handle is acquired during geometry creation
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// vertex data
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vertices.resize( sn_utils::ld_uint32( Input ) );
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gfx::basic_vertex localvertex;
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for( auto &vertex : vertices ) {
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localvertex.deserialize( Input );
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vertex.position = origin + glm::dvec3{ localvertex.position };
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vertex.normal = localvertex.normal;
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vertex.texture = localvertex.texture;
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}
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}
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// sends content of the class to provided stream
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void
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lines_node::serialize( std::ostream &Output ) const {
|
|
// name
|
|
sn_utils::s_str( Output, m_name );
|
|
// node data
|
|
m_data.serialize( Output );
|
|
}
|
|
|
|
// restores content of the node from provided input stream
|
|
lines_node &
|
|
lines_node::deserialize( std::istream &Input ) {
|
|
// name
|
|
m_name = sn_utils::d_str( Input );
|
|
// node data
|
|
m_data.deserialize( Input );
|
|
|
|
return *this;
|
|
}
|
|
|
|
// restores content of the node from provded input stream
|
|
lines_node &
|
|
lines_node::import( cParser &Input, scene::node_data const &Nodedata ) {
|
|
|
|
// import common data
|
|
m_name = Nodedata.name;
|
|
m_data.rangesquared_min = Nodedata.range_min * Nodedata.range_min;
|
|
m_data.rangesquared_max = (
|
|
Nodedata.range_max >= 0.0 ?
|
|
Nodedata.range_max * Nodedata.range_max :
|
|
std::numeric_limits<double>::max() );
|
|
|
|
// material
|
|
Input.getTokens( 3, false );
|
|
Input
|
|
>> m_data.lighting.diffuse.r
|
|
>> m_data.lighting.diffuse.g
|
|
>> m_data.lighting.diffuse.b;
|
|
m_data.lighting.diffuse /= 255.f;
|
|
m_data.lighting.diffuse.a = 1.f;
|
|
Input.getTokens( 1, false );
|
|
Input
|
|
>> m_data.line_width;
|
|
m_data.line_width = std::min( 30.f, m_data.line_width ); // 30 pix equals rougly width of a signal pole viewed from ~1m away
|
|
|
|
// geometry
|
|
enum subtype {
|
|
lines,
|
|
line_strip,
|
|
line_loop
|
|
};
|
|
|
|
subtype const nodetype = (
|
|
Nodedata.type == "lines" ? lines :
|
|
Nodedata.type == "line_strip" ? line_strip :
|
|
line_loop );
|
|
std::size_t vertexcount { 0 };
|
|
world_vertex vertex, vertex0, vertex1;
|
|
std::string token = Input.getToken<std::string>();
|
|
do {
|
|
vertex.position.x = std::atof( token.c_str() );
|
|
Input.getTokens( 2, false );
|
|
Input
|
|
>> vertex.position.y
|
|
>> vertex.position.z;
|
|
// convert all data to gl_lines to allow data merge for matching nodes
|
|
switch( nodetype ) {
|
|
case lines: {
|
|
m_data.vertices.emplace_back( vertex );
|
|
break;
|
|
}
|
|
case line_strip: {
|
|
if( vertexcount > 0 ) {
|
|
m_data.vertices.emplace_back( vertex1 );
|
|
m_data.vertices.emplace_back( vertex );
|
|
}
|
|
vertex1 = vertex;
|
|
++vertexcount;
|
|
break;
|
|
}
|
|
case line_loop: {
|
|
if( vertexcount == 0 ) {
|
|
vertex0 = vertex;
|
|
vertex1 = vertex;
|
|
}
|
|
else {
|
|
m_data.vertices.emplace_back( vertex1 );
|
|
m_data.vertices.emplace_back( vertex );
|
|
}
|
|
vertex1 = vertex;
|
|
++vertexcount;
|
|
break;
|
|
}
|
|
default: { break; }
|
|
}
|
|
token = Input.getToken<std::string>();
|
|
|
|
} while( token != "endline" );
|
|
// add closing line for the loop
|
|
if( ( nodetype == line_loop )
|
|
&& ( vertexcount > 2 ) ) {
|
|
m_data.vertices.emplace_back( vertex1 );
|
|
m_data.vertices.emplace_back( vertex0 );
|
|
}
|
|
if( m_data.vertices.size() % 2 != 0 ) {
|
|
ErrorLog( "Lines node specified odd number of vertices, defined in file \"" + Input.Name() + "\" (line " + std::to_string( Input.Line() - 1 ) + ")" );
|
|
m_data.vertices.pop_back();
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
// adds content of provided node to already enclosed geometry. returns: true if merge could be performed
|
|
bool
|
|
lines_node::merge( lines_node &Lines ) {
|
|
|
|
if( ( m_data.line_width != Lines.m_data.line_width )
|
|
|| ( m_data.lighting != Lines.m_data.lighting ) ) {
|
|
// can't merge nodes with different appearance
|
|
return false;
|
|
}
|
|
// add geometry from provided node
|
|
m_data.area.center =
|
|
interpolate(
|
|
m_data.area.center, Lines.m_data.area.center,
|
|
static_cast<double>( Lines.m_data.vertices.size() ) / ( Lines.m_data.vertices.size() + m_data.vertices.size() ) );
|
|
m_data.vertices.insert(
|
|
std::end( m_data.vertices ),
|
|
std::begin( Lines.m_data.vertices ), std::end( Lines.m_data.vertices ) );
|
|
// NOTE: we could recalculate radius with something other than brute force, but it'll do
|
|
compute_radius();
|
|
|
|
return true;
|
|
}
|
|
|
|
// generates renderable version of held non-instanced geometry in specified geometry bank
|
|
void
|
|
lines_node::create_geometry( gfx::geometrybank_handle const &Bank ) {
|
|
|
|
gfx::vertex_array vertices; vertices.reserve( m_data.vertices.size() );
|
|
|
|
for( auto const &vertex : m_data.vertices ) {
|
|
vertices.emplace_back(
|
|
vertex.position - m_data.origin,
|
|
vertex.normal,
|
|
vertex.texture );
|
|
}
|
|
m_data.geometry = GfxRenderer.Insert( vertices, Bank, GL_LINES );
|
|
std::vector<world_vertex>().swap( m_data.vertices ); // hipster shrink_to_fit
|
|
}
|
|
|
|
// calculates node's bounding radius
|
|
void
|
|
lines_node::compute_radius() {
|
|
|
|
auto squaredradius { 0.0 };
|
|
for( auto const &vertex : m_data.vertices ) {
|
|
squaredradius = std::max(
|
|
squaredradius,
|
|
glm::length2( vertex.position - m_data.area.center ) );
|
|
}
|
|
m_data.area.radius = static_cast<float>( std::sqrt( squaredradius ) );
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
memory_node &
|
|
memory_node::deserialize( cParser &Input, node_data const &Nodedata ) {
|
|
|
|
// import common data
|
|
m_name = Nodedata.name;
|
|
|
|
Input.getTokens( 3 );
|
|
Input
|
|
>> m_data.area.center.x
|
|
>> m_data.area.center.y
|
|
>> m_data.area.center.z;
|
|
|
|
TMemCell memorycell( Nodedata.name );
|
|
memorycell.Load( &Input );
|
|
}
|
|
*/
|
|
|
|
|
|
|
|
basic_node::basic_node( scene::node_data const &Nodedata ) :
|
|
m_name( Nodedata.name )
|
|
{
|
|
m_rangesquaredmin = Nodedata.range_min * Nodedata.range_min;
|
|
m_rangesquaredmax = (
|
|
Nodedata.range_max >= 0.0 ?
|
|
Nodedata.range_max * Nodedata.range_max :
|
|
std::numeric_limits<double>::max() );
|
|
}
|
|
|
|
// sends content of the class to provided stream
|
|
void
|
|
basic_node::serialize( std::ostream &Output ) const {
|
|
// bounding area
|
|
m_area.serialize( Output );
|
|
// visibility
|
|
sn_utils::ls_float64( Output, m_rangesquaredmin );
|
|
sn_utils::ls_float64( Output, m_rangesquaredmax );
|
|
sn_utils::s_bool( Output, m_visible );
|
|
// name
|
|
sn_utils::s_str( Output, m_name );
|
|
// template method implementation
|
|
serialize_( Output );
|
|
}
|
|
|
|
// restores content of the class from provided stream
|
|
void
|
|
basic_node::deserialize( std::istream &Input ) {
|
|
// bounding area
|
|
m_area.deserialize( Input );
|
|
// visibility
|
|
m_rangesquaredmin = sn_utils::ld_float64( Input );
|
|
m_rangesquaredmax = sn_utils::ld_float64( Input );
|
|
m_visible = sn_utils::d_bool( Input );
|
|
// name
|
|
m_name = sn_utils::d_str( Input );
|
|
// template method implementation
|
|
deserialize_( Input );
|
|
}
|
|
|
|
// sends basic content of the class in legacy (text) format to provided stream
|
|
void
|
|
basic_node::export_as_text( std::ostream &Output ) const {
|
|
|
|
Output
|
|
// header
|
|
<< "node"
|
|
// visibility
|
|
<< ' ' << ( m_rangesquaredmax < std::numeric_limits<double>::max() ? std::sqrt( m_rangesquaredmax ) : -1 )
|
|
<< ' ' << std::sqrt( m_rangesquaredmin )
|
|
// name
|
|
<< ' ' << m_name << ' ';
|
|
// template method implementation
|
|
export_as_text_( Output );
|
|
}
|
|
|
|
void
|
|
basic_node::export_as_text( std::string &Output ) const {
|
|
|
|
std::stringstream converter;
|
|
export_as_text( converter );
|
|
Output += converter.str();
|
|
}
|
|
|
|
float const &
|
|
basic_node::radius() {
|
|
|
|
if( m_area.radius == -1.0 ) {
|
|
// calculate if needed
|
|
m_area.radius = radius_();
|
|
}
|
|
return m_area.radius;
|
|
}
|
|
|
|
// radius() subclass details, calculates node's bounding radius
|
|
// by default nodes are 'virtual don't extend from their center point
|
|
float
|
|
basic_node::radius_() {
|
|
|
|
return 0.f;
|
|
}
|
|
|
|
} // scene
|
|
|
|
//---------------------------------------------------------------------------
|