mirror of
https://github.com/MaSzyna-EU07/maszyna.git
synced 2026-03-22 15:05:03 +01:00
297 lines
9.6 KiB
C++
297 lines
9.6 KiB
C++
/*
|
|
This Source Code Form is subject to the
|
|
terms of the Mozilla Public License, v.
|
|
2.0. If a copy of the MPL was not
|
|
distributed with this file, You can
|
|
obtain one at
|
|
http://mozilla.org/MPL/2.0/.
|
|
*/
|
|
|
|
#include "stdafx.h"
|
|
#include "geometrybank.h"
|
|
#include "openglgeometrybank.h"
|
|
#include "opengl33geometrybank.h"
|
|
|
|
#include "sn_utils.h"
|
|
#include "Logs.h"
|
|
#include "Globals.h"
|
|
|
|
namespace gfx {
|
|
|
|
void
|
|
basic_vertex::serialize( std::ostream &s ) const {
|
|
|
|
sn_utils::ls_float32( s, position.x );
|
|
sn_utils::ls_float32( s, position.y );
|
|
sn_utils::ls_float32( s, position.z );
|
|
|
|
sn_utils::ls_float32( s, normal.x );
|
|
sn_utils::ls_float32( s, normal.y );
|
|
sn_utils::ls_float32( s, normal.z );
|
|
|
|
sn_utils::ls_float32( s, texture.x );
|
|
sn_utils::ls_float32( s, texture.y );
|
|
}
|
|
|
|
void
|
|
basic_vertex::deserialize( std::istream &s ) {
|
|
|
|
position.x = sn_utils::ld_float32( s );
|
|
position.y = sn_utils::ld_float32( s );
|
|
position.z = sn_utils::ld_float32( s );
|
|
|
|
normal.x = sn_utils::ld_float32( s );
|
|
normal.y = sn_utils::ld_float32( s );
|
|
normal.z = sn_utils::ld_float32( s );
|
|
|
|
texture.x = sn_utils::ld_float32( s );
|
|
texture.y = sn_utils::ld_float32( s );
|
|
}
|
|
|
|
// based on
|
|
// Lengyel, Eric. “Computing Tangent Space Basis Vectors for an Arbitrary Mesh”.
|
|
// Terathon Software, 2001. http://terathon.com/code/tangent.html
|
|
void calculate_tangent(vertex_array &vertices, int type)
|
|
{
|
|
size_t vertex_count = vertices.size();
|
|
|
|
if (!vertex_count || vertices[0].tangent.w != 0.0f)
|
|
return;
|
|
|
|
size_t triangle_count;
|
|
if (type == GL_TRIANGLES)
|
|
triangle_count = vertex_count / 3;
|
|
else if (type == GL_TRIANGLE_STRIP)
|
|
triangle_count = vertex_count - 2;
|
|
else if (type == GL_TRIANGLE_FAN)
|
|
triangle_count = vertex_count - 2;
|
|
else
|
|
return;
|
|
|
|
std::vector<glm::vec3> tan(vertex_count * 2);
|
|
|
|
for (size_t a = 0; a < triangle_count; a++)
|
|
{
|
|
size_t i1, i2, i3;
|
|
if (type == GL_TRIANGLES)
|
|
{
|
|
i1 = a * 3;
|
|
i2 = a * 3 + 1;
|
|
i3 = a * 3 + 2;
|
|
}
|
|
else if (type == GL_TRIANGLE_STRIP)
|
|
{
|
|
if (a % 2 == 0)
|
|
{
|
|
i1 = a;
|
|
i2 = a + 1;
|
|
}
|
|
else
|
|
{
|
|
i1 = a + 1;
|
|
i2 = a;
|
|
}
|
|
i3 = a + 2;
|
|
}
|
|
else if (type == GL_TRIANGLE_FAN)
|
|
{
|
|
i1 = 0;
|
|
i2 = a + 1;
|
|
i3 = a + 2;
|
|
}
|
|
|
|
const glm::vec3 &v1 = vertices[i1].position;
|
|
const glm::vec3 &v2 = vertices[i2].position;
|
|
const glm::vec3 &v3 = vertices[i3].position;
|
|
|
|
const glm::vec2 &w1 = vertices[i1].texture;
|
|
const glm::vec2 &w2 = vertices[i2].texture;
|
|
const glm::vec2 &w3 = vertices[i3].texture;
|
|
|
|
float x1 = v2.x - v1.x;
|
|
float x2 = v3.x - v1.x;
|
|
float y1 = v2.y - v1.y;
|
|
float y2 = v3.y - v1.y;
|
|
float z1 = v2.z - v1.z;
|
|
float z2 = v3.z - v1.z;
|
|
|
|
float s1 = w2.x - w1.x;
|
|
float s2 = w3.x - w1.x;
|
|
float t1 = w2.y - w1.y;
|
|
float t2 = w3.y - w1.y;
|
|
|
|
float ri = (s1 * t2 - s2 * t1);
|
|
if (ri == 0.0f) {
|
|
//ErrorLog("Bad model: failed to generate tangent vectors for vertices: " +
|
|
// std::to_string(i1) + ", " + std::to_string(i2) + ", " + std::to_string(i3));
|
|
// useless error, as we don't have name of problematic model here
|
|
// why does it happen?
|
|
ri = 1.0f;
|
|
}
|
|
|
|
float r = 1.0f / ri;
|
|
glm::vec3 sdir((t2 * x1 - t1 * x2) * r, (t2 * y1 - t1 * y2) * r,
|
|
(t2 * z1 - t1 * z2) * r);
|
|
glm::vec3 tdir((s1 * x2 - s2 * x1) * r, (s1 * y2 - s2 * y1) * r,
|
|
(s1 * z2 - s2 * z1) * r);
|
|
|
|
tan[i1] += sdir;
|
|
tan[i2] += sdir;
|
|
tan[i3] += sdir;
|
|
|
|
tan[vertex_count + i1] += tdir;
|
|
tan[vertex_count + i2] += tdir;
|
|
tan[vertex_count + i3] += tdir;
|
|
}
|
|
|
|
for (size_t a = 0; a < vertex_count; a++)
|
|
{
|
|
const glm::vec3 &n = vertices[a].normal;
|
|
const glm::vec3 &t = tan[a];
|
|
const glm::vec3 &t2 = tan[vertex_count + a];
|
|
|
|
vertices[a].tangent =
|
|
glm::vec4(
|
|
glm::normalize((t - n * glm::dot(n, t))),
|
|
(glm::dot(glm::cross(n, t), t2) < 0.0F) ?
|
|
-1.0F :
|
|
1.0F);
|
|
}
|
|
}
|
|
|
|
// generic geometry bank class, allows storage, update and drawing of geometry chunks
|
|
|
|
// creates a new geometry chunk of specified type from supplied vertex data. returns: handle to the chunk
|
|
gfx::geometry_handle
|
|
geometry_bank::create( gfx::vertex_array &Vertices, unsigned int const Type ) {
|
|
|
|
if( true == Vertices.empty() ) { return { 0, 0 }; }
|
|
|
|
m_chunks.emplace_back( Vertices, Type );
|
|
// NOTE: handle is effectively (index into chunk array + 1) this leaves value of 0 to serve as error/empty handle indication
|
|
gfx::geometry_handle chunkhandle { 0, static_cast<std::uint32_t>(m_chunks.size()) };
|
|
// template method implementation
|
|
create_( chunkhandle );
|
|
// all done
|
|
return chunkhandle;
|
|
}
|
|
|
|
// replaces data of specified chunk with the supplied vertex data, starting from specified offset
|
|
bool
|
|
geometry_bank::replace( gfx::vertex_array &Vertices, gfx::geometry_handle const &Geometry, std::size_t const Offset ) {
|
|
|
|
if( ( Geometry.chunk == 0 ) || ( Geometry.chunk > m_chunks.size() ) ) { return false; }
|
|
|
|
auto &chunk = gfx::geometry_bank::chunk( Geometry );
|
|
|
|
if( ( Offset == 0 )
|
|
&& ( Vertices.size() == chunk.vertices.size() ) ) {
|
|
// check first if we can get away with a simple swap...
|
|
chunk.vertices.swap( Vertices );
|
|
}
|
|
else {
|
|
// ...otherwise we need to do some legwork
|
|
// NOTE: if the offset is larger than existing size of the chunk, it'll bridge the gap with 'blank' vertices
|
|
// TBD: we could bail out with an error instead if such request occurs
|
|
chunk.vertices.resize( Offset + Vertices.size(), gfx::basic_vertex() );
|
|
chunk.vertices.insert( std::end( chunk.vertices ), std::begin( Vertices ), std::end( Vertices ) );
|
|
}
|
|
// template method implementation
|
|
replace_( Geometry );
|
|
// all done
|
|
return true;
|
|
}
|
|
|
|
// adds supplied vertex data at the end of specified chunk
|
|
bool
|
|
geometry_bank::append( gfx::vertex_array &Vertices, gfx::geometry_handle const &Geometry ) {
|
|
|
|
if( ( Geometry.chunk == 0 ) || ( Geometry.chunk > m_chunks.size() ) ) { return false; }
|
|
|
|
return replace( Vertices, Geometry, gfx::geometry_bank::chunk( Geometry ).vertices.size() );
|
|
}
|
|
|
|
// draws geometry stored in specified chunk
|
|
void
|
|
geometry_bank::draw( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, unsigned int const Streams ) {
|
|
// template method implementation
|
|
draw_( Geometry, Units, Streams );
|
|
}
|
|
|
|
// frees subclass-specific resources associated with the bank, typically called when the bank wasn't in use for a period of time
|
|
void
|
|
geometry_bank::release() {
|
|
// template method implementation
|
|
release_();
|
|
}
|
|
|
|
vertex_array const &
|
|
geometry_bank::vertices( gfx::geometry_handle const &Geometry ) const {
|
|
|
|
return geometry_bank::chunk( Geometry ).vertices;
|
|
}
|
|
|
|
// geometry bank manager, holds collection of geometry banks
|
|
|
|
// performs a resource sweep
|
|
void
|
|
geometrybank_manager::update() {
|
|
|
|
m_garbagecollector.sweep();
|
|
}
|
|
|
|
// creates a new geometry bank. returns: handle to the bank or NULL
|
|
gfx::geometrybank_handle
|
|
geometrybank_manager::create_bank() {
|
|
|
|
if( Global.GfxRenderer == "default" ) { m_geometrybanks.emplace_back( std::make_shared<opengl33_vaogeometrybank>(), std::chrono::steady_clock::time_point() ); }
|
|
else if( true == Global.bUseVBO ) { m_geometrybanks.emplace_back( std::make_shared<opengl_vbogeometrybank>(), std::chrono::steady_clock::time_point() ); }
|
|
else { m_geometrybanks.emplace_back( std::make_shared<opengl_dlgeometrybank>(), std::chrono::steady_clock::time_point() ); }
|
|
// NOTE: handle is effectively (index into chunk array + 1) this leaves value of 0 to serve as error/empty handle indication
|
|
return { static_cast<std::uint32_t>( m_geometrybanks.size() ), 0 };
|
|
}
|
|
|
|
// creates a new geometry chunk of specified type from supplied vertex data, in specified bank. returns: handle to the chunk or NULL
|
|
gfx::geometry_handle
|
|
geometrybank_manager::create_chunk( gfx::vertex_array &Vertices, gfx::geometrybank_handle const &Geometry, int const Type ) {
|
|
|
|
auto const newchunkhandle = bank( Geometry ).first->create( Vertices, Type );
|
|
|
|
if( newchunkhandle.chunk != 0 ) { return { Geometry.bank, newchunkhandle.chunk }; }
|
|
else { return { 0, 0 }; }
|
|
}
|
|
|
|
// replaces data of specified chunk with the supplied vertex data, starting from specified offset
|
|
bool
|
|
geometrybank_manager::replace( gfx::vertex_array &Vertices, gfx::geometry_handle const &Geometry, std::size_t const Offset ) {
|
|
|
|
return bank( Geometry ).first->replace( Vertices, Geometry, Offset );
|
|
}
|
|
|
|
// adds supplied vertex data at the end of specified chunk
|
|
bool
|
|
geometrybank_manager::append( gfx::vertex_array &Vertices, gfx::geometry_handle const &Geometry ) {
|
|
|
|
return bank( Geometry ).first->append( Vertices, Geometry );
|
|
}
|
|
// draws geometry stored in specified chunk
|
|
void
|
|
geometrybank_manager::draw( gfx::geometry_handle const &Geometry, unsigned int const Streams ) {
|
|
|
|
if( Geometry == null_handle ) { return; }
|
|
|
|
auto &bankrecord = bank( Geometry );
|
|
|
|
bankrecord.second = m_garbagecollector.timestamp();
|
|
bankrecord.first->draw( Geometry, m_units, Streams );
|
|
}
|
|
|
|
// provides direct access to vertex data of specfied chunk
|
|
gfx::vertex_array const &
|
|
geometrybank_manager::vertices( gfx::geometry_handle const &Geometry ) const {
|
|
|
|
return bank( Geometry ).first->vertices( Geometry );
|
|
}
|
|
|
|
} // namespace gfx
|