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Code Issues 121 Wiki Activity

build 170424. basic shadow mapping implementation, multi texturing unit setup

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This commit is contained in:
tmj-fstate
2017-07-24 01:26:05 +02:00
parent ba5a3613ad
commit d2d93616fa
10 changed files with 601 additions and 145 deletions
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642
renderer.cpp
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@@ -25,9 +25,12 @@ http://mozilla.org/MPL/2.0/.
opengl_renderer GfxRenderer;
extern TWorld World;
//#define EU07_USE_ORTHO_SHADOWS
namespace colors {
glm::vec4 const none { 0.0f, 0.0f, 0.0f, 1.0f };
glm::vec4 const none { 0.f, 0.f, 0.f, 1.f };
glm::vec4 const white{ 1.f, 1.f, 1.f, 1.f };
} // namespace colors
@@ -67,6 +70,10 @@ opengl_renderer::Init( GLFWwindow *Window ) {
glEnable( GL_CULL_FACE ); // Cull back-facing triangles
glShadeModel( GL_SMOOTH ); // Enable Smooth Shading
glActiveTexture( m_diffusetextureunit );
glClientActiveTexture( m_diffusetextureunit );
UILayer.set_unit( m_diffusetextureunit );
glEnable( GL_DEPTH_TEST );
glAlphaFunc( GL_GREATER, 0.04f );
glEnable( GL_ALPHA_TEST );
@@ -152,22 +159,41 @@ opengl_renderer::Init( GLFWwindow *Window ) {
::glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, 0 ); // switch back to primary render target for now
}
#endif
::glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
// preload some common textures
WriteLog( "Loading common gfx data..." );
m_glaretexture = Fetch_Texture( "fx\\lightglare" );
m_suntexture = Fetch_Texture( "fx\\sun" );
m_moontexture = Fetch_Texture( "fx\\moon" );
if( m_helpertextureunit >= 0 ) {
m_reflectiontexture = Fetch_Texture( "fx\\reflections" );
}
WriteLog( "...gfx data pre-loading done" );
// shadowmap resources
if( ( true == Global::RenderShadows )
&& ( true == m_framebuffersupport ) ) {
// texture:
::glGenTextures( 1, &m_shadowtexture );
::glBindTexture( GL_TEXTURE_2D, m_shadowtexture );
// allocate memory
::glTexImage2D( GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, m_shadowbuffersize, m_shadowbuffersize, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL );
// setup parameters
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
// enable shadow comparison: true (ie not in shadow) if r<=texture...
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL );
// ...shadow comparison should generate an INTENSITY result
::glTexParameteri( GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_INTENSITY );
::glTexImage2D( GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, m_shadowbuffersize, m_shadowbuffersize, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL );
::glTexParameteri( GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE );
// eye_linear is the default, so we could probably skip it
::glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR );
::glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR );
::glTexGeni( GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR );
::glTexGeni( GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR );
::glBindTexture( GL_TEXTURE_2D, 0 );
// create and assemble the framebuffer
::glGenFramebuffersEXT( 1, &m_shadowframebuffer );
::glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, m_shadowframebuffer );
@@ -187,13 +213,6 @@ opengl_renderer::Init( GLFWwindow *Window ) {
::glDrawBuffer( GL_BACK );
}
::glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
// preload some common textures
WriteLog( "Loading common gfx data..." );
m_glaretexture = Fetch_Texture( "fx\\lightglare" );
m_suntexture = Fetch_Texture( "fx\\sun" );
m_moontexture = Fetch_Texture( "fx\\moon" );
WriteLog( "...gfx data pre-loading done" );
// prepare basic geometry chunks
auto const geometrybank = m_geometry.create_bank();
float const size = 2.5f;
@@ -217,6 +236,7 @@ opengl_renderer::Render() {
auto const drawstart = std::chrono::steady_clock::now();
m_renderpass.draw_mode = rendermode::none; // force setup anew
Render_pass( rendermode::color );
glfwSwapBuffers( m_window );
@@ -248,7 +268,15 @@ opengl_renderer::Render_pass( rendermode const Mode ) {
::glDrawBuffer( GL_BACK );
}
::glViewport( 0, 0, Global::ScreenWidth, Global::ScreenHeight );
if( ( Global::iTextMode == GLFW_KEY_F8 ) && ( Global::iScreenMode[ GLFW_KEY_F8 - GLFW_KEY_F1 ] == 1 ) ) {
// debug shadowmap
::glViewport( 0, 0, Global::ScreenHeight, Global::ScreenHeight );
m_renderpass.draw_range = 1250.f; // 1.0km square centered around camera
}
else {
::glViewport( 0, 0, Global::ScreenWidth, Global::ScreenHeight );
m_renderpass.draw_range = 2500.0f; // arbitrary base draw range
}
if( World.InitPerformed() ) {
auto const skydomecolour = World.Environment.m_skydome.GetAverageColor();
@@ -261,19 +289,22 @@ opengl_renderer::Render_pass( rendermode const Mode ) {
if( World.InitPerformed() ) {
// setup
m_renderpass.draw_range = 2500.0f; // arbitrary base draw range
Render_projection();
Render_camera();
setup_projection();
setup_camera();
::glDepthFunc( GL_LEQUAL );
// render
Render_setup( true );
setup_drawing( true );
setup_units( true, false, false );
Render( &World.Environment );
// opaque parts...
Render_setup();
setup_drawing( false );
setup_units( true, true, true );
Render( &World.Ground );
// ...translucent parts
Render_setup( true );
setup_drawing( true );
Render_Alpha( &World.Ground );
// cab render is performed without shadows, due to low resolution and number of models without windows :|
toggle_units( true, false, false );
// cab render is done in translucent phase to deal with badly configured vehicles
if( World.Train != nullptr ) { Render_cab( World.Train->Dynamic() ); }
}
@@ -283,21 +314,34 @@ opengl_renderer::Render_pass( rendermode const Mode ) {
case rendermode::shadows: {
::glViewport( 0, 0, m_shadowbuffersize, m_shadowbuffersize );
::glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
::glClear( GL_DEPTH_BUFFER_BIT );
if( World.InitPerformed() ) {
// setup
m_renderpass.draw_range = 500.0f; // 1.0km square centered around camera
Render_projection();
Render_camera();
::glViewport( 0, 0, m_shadowbuffersize, m_shadowbuffersize );
::glClear( GL_DEPTH_BUFFER_BIT );
::glScissor( 1, 1, m_shadowbuffersize - 2, m_shadowbuffersize - 2 );
::glEnable( GL_SCISSOR_TEST );
m_renderpass.draw_range = 1250.f; // 1.0km square centered around camera
m_shadowtexturematrix =
glm::mat4{
0.5f, 0.0f, 0.0f, 0.0f,
0.0f, 0.5f, 0.0f, 0.0f,
0.0f, 0.0f, 0.5f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f }; //bias from [-1, 1] to [0, 1] };
setup_projection();
setup_camera();
::glDepthFunc( GL_LEQUAL );
::glEnable( GL_POLYGON_OFFSET_FILL ); // alleviate depth-fighting
::glPolygonOffset( 4.f, 8.f );
// render
// opaque parts...
Render_setup();
setup_drawing( false );
setup_units( false, false, false );
Render( &World.Ground );
// post-render restore
::glDisable( GL_POLYGON_OFFSET_FILL );
::glDisable( GL_SCISSOR_TEST );
}
break;
}
@@ -307,19 +351,20 @@ opengl_renderer::Render_pass( rendermode const Mode ) {
#ifdef EU07_USE_PICKING_FRAMEBUFFER
::glViewport( 0, 0, m_pickbuffersize, m_pickbuffersize );
#endif
::glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
::glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
if( World.InitPerformed() ) {
// setup
::glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
::glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
m_pickcontrolsitems.clear();
m_renderpass.draw_range = 50.0f; // doesn't really matter for control picking
Render_projection();
Render_camera();
setup_projection();
setup_camera();
::glDepthFunc( GL_LEQUAL );
// render
// opaque parts...
Render_setup();
setup_drawing( false );
setup_units( false, false, false );
// cab render skips translucent parts, so we can do it here
if( World.Train != nullptr ) { Render_cab( World.Train->Dynamic() ); }
}
@@ -332,19 +377,20 @@ opengl_renderer::Render_pass( rendermode const Mode ) {
#ifdef EU07_USE_PICKING_FRAMEBUFFER
::glViewport( 0, 0, m_pickbuffersize, m_pickbuffersize );
#endif
::glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
::glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
if( World.InitPerformed() ) {
// setup
::glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
::glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
m_picksceneryitems.clear();
m_renderpass.draw_range = 1000.0f; // scenery picking is likely to focus on nearby nodes
Render_projection();
Render_camera();
setup_projection();
setup_camera();
::glDepthFunc( GL_LEQUAL );
// render
// opaque parts...
Render_setup();
setup_drawing( false );
setup_units( false, false, false );
Render( &World.Ground );
}
break;
@@ -354,12 +400,11 @@ opengl_renderer::Render_pass( rendermode const Mode ) {
break;
}
}
}
// configures projection matrix for the current render pass
void
opengl_renderer::Render_projection() {
opengl_renderer::setup_projection() {
::glMatrixMode( GL_PROJECTION );
::glLoadIdentity();
@@ -371,11 +416,17 @@ opengl_renderer::Render_projection() {
case rendermode::pickscenery:
#endif
case rendermode::color: {
::gluPerspective(
Global::FieldOfView / Global::ZoomFactor,
std::max( 1.0f, (float)Global::ScreenWidth ) / std::max( 1.0f, (float)Global::ScreenHeight ),
0.1f * Global::ZoomFactor,
m_renderpass.draw_range * Global::fDistanceFactor );
if( ( Global::iTextMode == GLFW_KEY_F8 ) && ( Global::iScreenMode[ GLFW_KEY_F8 - GLFW_KEY_F1 ] == 1 ) ) {
// debug shadowmap
#ifdef EU07_USE_ORTHO_SHADOWS
setup_projection_light_ortho();
#else
setup_projection_light_perspective();
#endif
}
else {
setup_projection_world();
}
break;
}
#ifdef EU07_USE_PICKING_FRAMEBUFFER
@@ -393,13 +444,12 @@ opengl_renderer::Render_projection() {
}
#endif
case rendermode::shadows: {
// TODO: set parallel projection
::gluPerspective(
Global::FieldOfView,
1.f,
// std::max( 1.0f, (float)Global::ScreenWidth ) / std::max( 1.0f, (float)Global::ScreenHeight ),
2.f,
m_renderpass.draw_range * Global::fDistanceFactor );
#ifdef EU07_USE_ORTHO_SHADOWS
setup_projection_light_ortho();
#else
setup_projection_light_perspective();
#endif
m_shadowtexturematrix *= OpenGLMatrices.data( GL_PROJECTION );
break;
}
@@ -409,9 +459,38 @@ opengl_renderer::Render_projection() {
}
}
void
opengl_renderer::setup_projection_world() {
::gluPerspective(
Global::FieldOfView / Global::ZoomFactor,
std::max( 1.f, (float)Global::ScreenWidth ) / std::max( 1.f, (float)Global::ScreenHeight ),
0.1f * Global::ZoomFactor,
m_renderpass.draw_range * Global::fDistanceFactor );
}
void
opengl_renderer::setup_projection_light_ortho() {
::glOrtho(
-250, 250,
-250, 250,
-2500, 2500 );
}
void
opengl_renderer::setup_projection_light_perspective() {
::gluPerspective(
45.f,
1.f,
100.f, // light source is pulled back far enough we won't likely have anything too close to it, can get some z-range here
m_renderpass.draw_range * Global::fDistanceFactor );
}
// configures modelview matrix for the current render pass
void
opengl_renderer::Render_camera() {
opengl_renderer::setup_camera() {
::glMatrixMode( GL_MODELVIEW ); // Select The Modelview Matrix
::glLoadIdentity();
@@ -422,17 +501,29 @@ opengl_renderer::Render_camera() {
case rendermode::color:
case rendermode::pickcontrols:
case rendermode::pickscenery: {
World.Camera.SetMatrix( viewmatrix );
m_renderpass.camera.position() = Global::pCameraPosition;
if( ( Global::iTextMode == GLFW_KEY_F8 ) && ( Global::iScreenMode[ GLFW_KEY_F8 - GLFW_KEY_F1 ] == 1 ) ) {
#ifdef EU07_USE_ORTHO_SHADOWS
setup_camera_light_ortho( viewmatrix );
#else
setup_camera_light_perspective( viewmatrix );
#endif
}
else {
setup_camera_world( viewmatrix );
}
break;
}
case rendermode::shadows: {
m_renderpass.camera.position() = Global::pCameraPosition - glm::dvec3{ Global::DayLight.direction * 250.f };
m_renderpass.camera.position().y = std::max( 50.0, m_renderpass.camera.position().y ); // prevent shadow source from dipping too low
viewmatrix = glm::lookAt(
m_renderpass.camera.position(),
glm::dvec3{ Global::pCameraPosition.x, 0.0, Global::pCameraPosition.z },
glm::dvec3{ 0.f, 1.f, 0.f } );
#ifdef EU07_USE_ORTHO_SHADOWS
setup_camera_light_ortho( viewmatrix );
#else
setup_camera_light_perspective( viewmatrix );
#endif
// during colour pass coordinates are moved from camera-centric to light-centric, essentially the difference between these two origins
m_shadowtexturematrix *=
glm::translate(
glm::mat4{ glm::dmat3{ viewmatrix } },
glm::vec3{ glm::dvec3{ Global::pCameraPosition } - m_renderpass.camera.position() } );
break;
}
default: {
@@ -445,7 +536,45 @@ opengl_renderer::Render_camera() {
}
void
opengl_renderer::Render_setup( bool const Alpha ) {
opengl_renderer::setup_camera_world( glm::dmat4 &Viewmatrix ) {
World.Camera.SetMatrix( Viewmatrix );
m_renderpass.camera.position() = Global::pCameraPosition;
}
void
opengl_renderer::setup_camera_light_ortho( glm::dmat4 &Viewmatrix ) {
/*
m_renderpass.camera.position() = Global::pCameraPosition - glm::dvec3{ Global::DayLight.direction * 250.f };
m_renderpass.camera.position().y = std::max( 75.0, m_renderpass.camera.position().y ); // prevent shadow source from dipping too low
Viewmatrix = glm::lookAt(
m_renderpass.camera.position(),
glm::dvec3{ Global::pCameraPosition.x, 0.0, Global::pCameraPosition.z },
glm::dvec3{ 0.f, 1.f, 0.f } );
*/
m_renderpass.camera.position() = Global::pCameraPosition - glm::dvec3{ Global::DayLight.direction };
if( m_renderpass.camera.position().y - Global::pCameraPosition.y < 0.15 ) {
m_renderpass.camera.position().y = Global::pCameraPosition.y + 0.15;
}
Viewmatrix = glm::lookAt(
m_renderpass.camera.position(),
glm::dvec3{ Global::pCameraPosition },
glm::dvec3{ 0.f, 1.f, 0.f } );
}
void
opengl_renderer::setup_camera_light_perspective( glm::dmat4 &Viewmatrix ) {
m_renderpass.camera.position() = Global::pCameraPosition - glm::dvec3{ Global::DayLight.direction * m_renderpass.draw_range * 0.5f };
m_renderpass.camera.position().y = std::max( 75.0, m_renderpass.camera.position().y ); // prevent shadow source from dipping too low
Viewmatrix = glm::lookAt(
m_renderpass.camera.position(),
glm::dvec3{ Global::pCameraPosition.x, 0.0, Global::pCameraPosition.z },
glm::dvec3{ 0.f, 1.f, 0.f } );
}
void
opengl_renderer::setup_drawing( bool const Alpha ) {
if( true == Alpha ) {
@@ -473,19 +602,6 @@ opengl_renderer::Render_setup( bool const Alpha ) {
}
else { ::glDisable( GL_FOG ); }
if( m_texenvmode != m_renderpass.draw_mode ) {
// texture colour and alpha
::glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_MODULATE );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR );
/*
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA );
*/
m_texenvmode = m_renderpass.draw_mode;
}
break;
}
case rendermode::shadows:
@@ -498,19 +614,6 @@ opengl_renderer::Render_setup( bool const Alpha ) {
}
::glDisable( GL_FOG );
if( m_texenvmode != m_renderpass.draw_mode ) {
// solid colour with texture alpha
::glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PRIMARY_COLOR ); // or GL_PREVIOUS
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR );
/*
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA );
*/
m_texenvmode = m_renderpass.draw_mode;
}
break;
}
default: {
@@ -519,6 +622,169 @@ opengl_renderer::Render_setup( bool const Alpha ) {
}
}
// configures, enables and disables specified texture units
void
opengl_renderer::setup_units( bool const Diffuse, bool const Shadows, bool const Reflections ) {
// helper texture unit.
// darkens previous stage, preparing data for the shadow texture unit to select from
if( m_helpertextureunit >= 0 ) {
if( ( true == Global::RenderShadows ) && ( true == Shadows ) ) {
// setup reflection texture unit
::glActiveTexture( m_helpertextureunit );
::glBindTexture( GL_TEXTURE_2D, m_reflectiontexture ); // TODO: move to reflection unit setup
::glEnable( GL_TEXTURE_2D );
/*
glTexGeni( GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP );
glTexGeni( GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP );
glEnable( GL_TEXTURE_GEN_S );
glEnable( GL_TEXTURE_GEN_T );
*/
::glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
::glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, glm::value_ptr( m_shadowcolor ) ); // TODO: dynamically calculated shadow colour, based on sun height
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_MODULATE ); // darken the previous stage
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PREVIOUS );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_CONSTANT );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR );
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE ); // simply copy alpha from diffuse stage
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS );
}
else {
::glActiveTexture( m_helpertextureunit );
::glDisable( GL_TEXTURE_2D );
/*
::glDisable( GL_TEXTURE_GEN_S );
::glDisable( GL_TEXTURE_GEN_T );
::glDisable( GL_TEXTURE_GEN_R );
::glDisable( GL_TEXTURE_GEN_Q );
*/
}
}
// shadow texture unit.
// interpolates between primary colour and the previous unit, which should hold darkened variant of the primary colour
if( m_shadowtextureunit >= 0 ) {
if( ( true == Global::RenderShadows ) && ( true == Shadows ) ) {
::glActiveTexture( m_shadowtextureunit );
::glBindTexture( GL_TEXTURE_2D, m_shadowtexture );
::glEnable( GL_TEXTURE_2D );
// s
::glTexGenfv( GL_S, GL_EYE_PLANE, glm::value_ptr( glm::row( m_shadowtexturematrix, 0 ) ) );
::glEnable( GL_TEXTURE_GEN_S );
// t
::glTexGenfv( GL_T, GL_EYE_PLANE, glm::value_ptr( glm::row( m_shadowtexturematrix, 1 ) ) );
::glEnable( GL_TEXTURE_GEN_T );
// r
::glTexGenfv( GL_R, GL_EYE_PLANE, glm::value_ptr( glm::row( m_shadowtexturematrix, 2 ) ) );
::glEnable( GL_TEXTURE_GEN_R );
// q
::glTexGenfv( GL_Q, GL_EYE_PLANE, glm::value_ptr( glm::row( m_shadowtexturematrix, 3 ) ) );
::glEnable( GL_TEXTURE_GEN_Q );
::glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE ); // choose between lit and lit * shadow colour, based on depth test
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PRIMARY_COLOR );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_PREVIOUS );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE2_RGB, GL_TEXTURE );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_COLOR );
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE ); // simply copy alpha from diffuse stage
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS );
}
else {
// turn off shadow map tests
::glActiveTexture( m_shadowtextureunit );
::glDisable( GL_TEXTURE_2D );
::glDisable( GL_TEXTURE_GEN_S );
::glDisable( GL_TEXTURE_GEN_T );
::glDisable( GL_TEXTURE_GEN_R );
::glDisable( GL_TEXTURE_GEN_Q );
}
}
// diffuse texture unit.
// NOTE: diffuse texture mapping is never fully disabled, alpha channel information is always included
::glActiveTexture( m_diffusetextureunit );
if( true == Diffuse ) {
// default behaviour, modulate with previous stage
::glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_MODULATE );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR );
/*
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA );
*/
}
else {
// solid colour with texture alpha
::glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PREVIOUS );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR );
/*
::glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE );
::glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE );
::glTexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA );
*/
}
}
// enables and disables specified texture units
void
opengl_renderer::toggle_units( bool const Diffuse, bool const Shadows, bool const Reflections ) {
// helper texture unit.
if( m_helpertextureunit >= 0 ) {
if( ( true == Global::RenderShadows ) && ( true == Shadows ) ) {
::glActiveTexture( m_helpertextureunit );
::glEnable( GL_TEXTURE_2D );
}
else {
::glActiveTexture( m_helpertextureunit );
::glDisable( GL_TEXTURE_2D );
}
}
// shadow texture unit.
if( m_shadowtextureunit >= 0 ) {
if( ( true == Global::RenderShadows ) && ( true == Shadows ) ) {
::glActiveTexture( m_shadowtextureunit );
::glEnable( GL_TEXTURE_2D );
}
else {
::glActiveTexture( m_shadowtextureunit );
::glDisable( GL_TEXTURE_2D );
}
}
// diffuse texture unit.
// NOTE: toggle actually disables diffuse texture mapping, unlike setup counterpart
if( true == Diffuse ) {
::glActiveTexture( m_diffusetextureunit );
::glEnable( GL_TEXTURE_2D );
}
else {
::glActiveTexture( m_diffusetextureunit );
::glDisable( GL_TEXTURE_2D );
}
}
void
opengl_renderer::setup_shadow_color( glm::vec4 const &Shadowcolor ) {
::glActiveTexture( m_helpertextureunit );
::glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, glm::value_ptr( Shadowcolor ) ); // in-shadow colour multiplier
::glActiveTexture( m_diffusetextureunit );
}
bool
opengl_renderer::Render( world_environment *Environment ) {
@@ -587,10 +853,10 @@ opengl_renderer::Render( world_environment *Environment ) {
float const size = 0.045f;
::glBegin( GL_TRIANGLE_STRIP );
::glTexCoord2f( 1.0f, 1.0f ); ::glVertex3f( -size, size, 0.0f );
::glTexCoord2f( 1.0f, 0.0f ); ::glVertex3f( -size, -size, 0.0f );
::glTexCoord2f( 0.0f, 1.0f ); ::glVertex3f( size, size, 0.0f );
::glTexCoord2f( 0.0f, 0.0f ); ::glVertex3f( size, -size, 0.0f );
::glMultiTexCoord2f( m_diffusetextureunit, 1.f, 1.f ); ::glVertex3f( -size, size, 0.f );
::glMultiTexCoord2f( m_diffusetextureunit, 1.f, 0.f ); ::glVertex3f( -size, -size, 0.f );
::glMultiTexCoord2f( m_diffusetextureunit, 0.f, 1.f ); ::glVertex3f( size, size, 0.f );
::glMultiTexCoord2f( m_diffusetextureunit, 0.f, 0.f ); ::glVertex3f( size, -size, 0.f );
::glEnd();
::glPopMatrix();
@@ -623,10 +889,10 @@ opengl_renderer::Render( world_environment *Environment ) {
else { moonv = 1.0f - 0.0f; moonu = 0.0f; }
::glBegin( GL_TRIANGLE_STRIP );
::glTexCoord2f( moonu, moonv ); ::glVertex3f( -size, size, 0.0f );
::glTexCoord2f( moonu, moonv - 0.333f ); ::glVertex3f( -size, -size, 0.0f );
::glTexCoord2f( moonu + 0.333f, moonv ); ::glVertex3f( size, size, 0.0f );
::glTexCoord2f( moonu + 0.333f, moonv - 0.333f ); ::glVertex3f( size, -size, 0.0f );
::glMultiTexCoord2f( m_diffusetextureunit, moonu, moonv ); ::glVertex3f( -size, size, 0.0f );
::glMultiTexCoord2f( m_diffusetextureunit, moonu, moonv - 0.333f ); ::glVertex3f( -size, -size, 0.0f );
::glMultiTexCoord2f( m_diffusetextureunit, moonu + 0.333f, moonv ); ::glVertex3f( size, size, 0.0f );
::glMultiTexCoord2f( m_diffusetextureunit, moonu + 0.333f, moonv - 0.333f ); ::glVertex3f( size, -size, 0.0f );
::glEnd();
::glPopMatrix();
@@ -831,21 +1097,23 @@ opengl_renderer::Render( TGroundRect *Groundcell ) {
case rendermode::pickscenery: {
// non-interactive scenery elements get neutral colour
::glColor3fv( glm::value_ptr( colors::none ) );
break;
}
case rendermode::shadows:
case rendermode::color:
case rendermode::color: {
if( Groundcell->nRenderRect != nullptr ) {
// nieprzezroczyste trójkąty kwadratu kilometrowego
for( TGroundNode *node = Groundcell->nRenderRect; node != nullptr; node = node->nNext3 ) {
Render( node );
}
}
break;
}
case rendermode::pickcontrols:
default: {
break;
}
}
if( Groundcell->nRenderRect != nullptr ) {
// nieprzezroczyste trójkąty kwadratu kilometrowego
for( TGroundNode *node = Groundcell->nRenderRect; node != nullptr; node = node->nNext3 ) {
Render( node );
}
}
if( Groundcell->nTerrain ) {
Render( Groundcell->nTerrain );
@@ -969,7 +1237,18 @@ opengl_renderer::Render( TGroundNode *Node ) {
return true;
}
double const distancesquared = SquareMagnitude( ( Node->pCenter - m_renderpass.camera.position() ) / Global::ZoomFactor );
double distancesquared;
switch( m_renderpass.draw_mode ) {
case rendermode::shadows: {
// 'camera' for the light pass is the light source, but we need distance from actual camera
distancesquared = SquareMagnitude( ( Node->pCenter - Global::pCameraPosition ) / Global::ZoomFactor );
break;
}
default: {
distancesquared = SquareMagnitude( ( Node->pCenter - m_renderpass.camera.position() ) / Global::ZoomFactor );
break;
}
}
if( ( distancesquared > ( Node->fSquareRadius * Global::fDistanceFactor ) )
|| ( distancesquared < ( Node->fSquareMinRadius / Global::fDistanceFactor ) ) ) {
return false;
@@ -1015,8 +1294,30 @@ opengl_renderer::Render( TGroundNode *Node ) {
#else
Node->Model->RaAnimate(); // jednorazowe przeliczenie animacji
Node->Model->RaPrepare();
if( Node->Model->pModel ) // renderowanie rekurencyjne submodeli
Render( Node->Model->pModel, Node->Model->Material(), Node->pCenter - m_renderpass.camera.position(), Node->Model->vAngle );
if( Node->Model->pModel ) {
// renderowanie rekurencyjne submodeli
switch( m_renderpass.draw_mode ) {
case rendermode::shadows: {
Render(
Node->Model->pModel,
Node->Model->Material(),
SquareMagnitude( Node->pCenter - Global::pCameraPosition ),
Node->pCenter - m_renderpass.camera.position(),
Node->Model->vAngle );
break;
}
default: {
auto const position = Node->pCenter - m_renderpass.camera.position();
Render(
Node->Model->pModel,
Node->Model->Material(),
SquareMagnitude( position ),
position,
Node->Model->vAngle );
break;
}
}
}
#endif
return true;
}
@@ -1154,11 +1455,20 @@ opengl_renderer::Render( TDynamicObject *Dynamic ) {
if( false == Dynamic->renderme ) {
return false;
}
// setup
TSubModel::iInstance = ( size_t )this; //żeby nie robić cudzych animacji
auto const originoffset = Dynamic->vPosition - m_renderpass.camera.position();
double const squaredistance = SquareMagnitude( originoffset / Global::ZoomFactor );
double squaredistance;
switch( m_renderpass.draw_mode ) {
case rendermode::shadows: {
squaredistance = SquareMagnitude( ( Dynamic->vPosition - Global::pCameraPosition ) / Global::ZoomFactor );
break;
}
default: {
squaredistance = SquareMagnitude( originoffset / Global::ZoomFactor );
break;
}
}
Dynamic->ABuLittleUpdate( squaredistance ); // ustawianie zmiennych submodeli dla wspólnego modelu
::glPushMatrix();
@@ -1342,7 +1652,7 @@ opengl_renderer::Render( TModel3d *Model, material_data const *Material, double
}
bool
opengl_renderer::Render( TModel3d *Model, material_data const *Material, Math3D::vector3 const &Position, Math3D::vector3 const &Angle ) {
opengl_renderer::Render( TModel3d *Model, material_data const *Material, double const Squaredistance, Math3D::vector3 const &Position, Math3D::vector3 const &Angle ) {
::glPushMatrix();
::glTranslated( Position.x, Position.y, Position.z );
@@ -1353,7 +1663,7 @@ opengl_renderer::Render( TModel3d *Model, material_data const *Material, Math3D:
if( Angle.z != 0.0 )
::glRotated( Angle.z, 0.0, 0.0, 1.0 );
auto const result = Render( Model, Material, SquareMagnitude( Position ) ); // position is effectively camera offset
auto const result = Render( Model, Material, Squaredistance );
::glPopMatrix();
@@ -1417,6 +1727,8 @@ opengl_renderer::Render( TSubModel *Submodel ) {
if( Global::fLuminance < Submodel->fLight ) {
// zeby swiecilo na kolorowo
::glMaterialfv( GL_FRONT, GL_EMISSION, glm::value_ptr( Submodel->f4Diffuse * Submodel->f4Emision.a ) );
// disable shadows so they don't obstruct self-lit items
setup_shadow_color( colors::white );
}
// main draw call
@@ -1429,6 +1741,7 @@ opengl_renderer::Render( TSubModel *Submodel ) {
if( Global::fLuminance < Submodel->fLight ) {
// restore default (lack of) brightness
::glMaterialfv( GL_FRONT, GL_EMISSION, glm::value_ptr( colors::none ) );
setup_shadow_color( m_shadowcolor );
}
#ifdef EU07_USE_OPTIMIZED_NORMALIZATION
switch( Submodel->m_normalizenormals ) {
@@ -1524,10 +1837,14 @@ opengl_renderer::Render( TSubModel *Submodel ) {
::glLoadIdentity();
::glTranslatef( lightcenter.x, lightcenter.y, lightcenter.z ); // początek układu zostaje bez zmian
setup_shadow_color( colors::white );
// main draw call
m_geometry.draw( Submodel->m_geometry );
// post-draw reset
// re-enable shadows
setup_shadow_color( m_shadowcolor );
::glPopMatrix();
::glPopAttrib();
}
@@ -1709,7 +2026,18 @@ opengl_renderer::Render_Alpha( TSubRect *Groundsubcell ) {
bool
opengl_renderer::Render_Alpha( TGroundNode *Node ) {
double const distancesquared = SquareMagnitude( ( Node->pCenter - m_renderpass.camera.position() ) / Global::ZoomFactor );
double distancesquared;
switch( m_renderpass.draw_mode ) {
case rendermode::shadows: {
// 'camera' for the light pass is the light source, but we need distance from actual camera
distancesquared = SquareMagnitude( ( Node->pCenter - Global::pCameraPosition ) / Global::ZoomFactor );
break;
}
default: {
distancesquared = SquareMagnitude( ( Node->pCenter - m_renderpass.camera.position() ) / Global::ZoomFactor );
break;
}
}
if( ( distancesquared > ( Node->fSquareRadius * Global::fDistanceFactor ) )
|| ( distancesquared < ( Node->fSquareMinRadius / Global::fDistanceFactor ) ) ) {
return false;
@@ -1766,8 +2094,30 @@ opengl_renderer::Render_Alpha( TGroundNode *Node ) {
Node->Model->RenderAlpha( Node->pCenter - m_renderpass.camera.position() );
#else
Node->Model->RaPrepare();
if( Node->Model->pModel ) // renderowanie rekurencyjne submodeli
Render_Alpha( Node->Model->pModel, Node->Model->Material(), Node->pCenter - m_renderpass.camera.position(), Node->Model->vAngle );
if( Node->Model->pModel ) {
// renderowanie rekurencyjne submodeli
switch( m_renderpass.draw_mode ) {
case rendermode::shadows: {
Render_Alpha(
Node->Model->pModel,
Node->Model->Material(),
SquareMagnitude( Node->pCenter - Global::pCameraPosition ),
Node->pCenter - m_renderpass.camera.position(),
Node->Model->vAngle );
break;
}
default: {
auto const position = Node->pCenter - m_renderpass.camera.position();
Render_Alpha(
Node->Model->pModel,
Node->Model->Material(),
SquareMagnitude( position ),
position,
Node->Model->vAngle );
break;
}
}
}
#endif
return true;
}
@@ -1848,7 +2198,17 @@ opengl_renderer::Render_Alpha( TDynamicObject *Dynamic ) {
// setup
TSubModel::iInstance = ( size_t )this; //żeby nie robić cudzych animacji
auto const originoffset = Dynamic->vPosition - m_renderpass.camera.position();
double const squaredistance = SquareMagnitude( originoffset / Global::ZoomFactor );
double squaredistance;
switch( m_renderpass.draw_mode ) {
case rendermode::shadows: {
squaredistance = SquareMagnitude( ( Dynamic->vPosition - Global::pCameraPosition ) / Global::ZoomFactor );
break;
}
default: {
squaredistance = SquareMagnitude( originoffset / Global::ZoomFactor );
break;
}
}
Dynamic->ABuLittleUpdate( squaredistance ); // ustawianie zmiennych submodeli dla wspólnego modelu
::glPushMatrix();
@@ -1936,7 +2296,7 @@ opengl_renderer::Render_Alpha( TModel3d *Model, material_data const *Material, d
}
bool
opengl_renderer::Render_Alpha( TModel3d *Model, material_data const *Material, Math3D::vector3 const &Position, Math3D::vector3 const &Angle ) {
opengl_renderer::Render_Alpha( TModel3d *Model, material_data const *Material, double const Squaredistance, Math3D::vector3 const &Position, Math3D::vector3 const &Angle ) {
::glPushMatrix();
::glTranslated( Position.x, Position.y, Position.z );
@@ -1947,7 +2307,7 @@ opengl_renderer::Render_Alpha( TModel3d *Model, material_data const *Material, M
if( Angle.z != 0.0 )
::glRotated( Angle.z, 0.0, 0.0, 1.0 );
auto const result = Render_Alpha( Model, Material, SquareMagnitude( Position ) ); // position is effectively camera offset
auto const result = Render_Alpha( Model, Material, Squaredistance ); // position is effectively camera offset
::glPopMatrix();
@@ -2006,6 +2366,8 @@ opengl_renderer::Render_Alpha( TSubModel *Submodel ) {
if( Global::fLuminance < Submodel->fLight ) {
// zeby swiecilo na kolorowo
::glMaterialfv( GL_FRONT, GL_EMISSION, glm::value_ptr( Submodel->f4Diffuse * Submodel->f4Emision.a ) );
// disable shadows so they don't obstruct self-lit items
setup_shadow_color( colors::white );
}
// main draw call
@@ -2018,6 +2380,7 @@ opengl_renderer::Render_Alpha( TSubModel *Submodel ) {
if( Global::fLuminance < Submodel->fLight ) {
// restore default (lack of) brightness
::glMaterialfv( GL_FRONT, GL_EMISSION, glm::value_ptr( colors::none ) );
setup_shadow_color( m_shadowcolor );
}
#ifdef EU07_USE_OPTIMIZED_NORMALIZATION
switch( Submodel->m_normalizenormals ) {
@@ -2068,6 +2431,8 @@ opengl_renderer::Render_Alpha( TSubModel *Submodel ) {
::glLoadIdentity(); // macierz jedynkowa
::glTranslatef( lightcenter.x, lightcenter.y, lightcenter.z ); // początek układu zostaje bez zmian
::glRotated( std::atan2( lightcenter.x, lightcenter.z ) * 180.0 / M_PI, 0.0, 1.0, 0.0 ); // jedynie obracamy w pionie o kąt
// disable shadows so they don't obstruct self-lit items
setup_shadow_color( colors::white );
// main draw call
m_geometry.draw( m_billboardgeometry );
@@ -2080,6 +2445,8 @@ opengl_renderer::Render_Alpha( TSubModel *Submodel ) {
// ...etc instead IF we had easy access to camera's forward and right vectors. TODO: check if Camera matrix is accessible
*/
// post-render cleanup
setup_shadow_color( m_shadowcolor );
::glPopMatrix();
::glPopAttrib();
}
@@ -2293,7 +2660,7 @@ opengl_renderer::Update( double const Deltatime ) {
};
// debug performance string
std::string const &
std::string
opengl_renderer::Info() const {
return m_debuginfo;
@@ -2397,15 +2764,36 @@ opengl_renderer::Init_caps() {
else {
WriteLog( "Framebuffer objects not supported, resorting to back buffer rendering where possible" );
}
if( Global::iMultisampling )
WriteLog( "Using multisampling x" + std::to_string( 1 << Global::iMultisampling ) );
// ograniczenie maksymalnego rozmiaru tekstur - parametr dla skalowania tekstur
{
GLint i;
glGetIntegerv( GL_MAX_TEXTURE_SIZE, &i );
if( i < Global::iMaxTextureSize )
Global::iMaxTextureSize = i;
GLint texturesize;
::glGetIntegerv( GL_MAX_TEXTURE_SIZE, &texturesize );
Global::iMaxTextureSize = std::min( Global::iMaxTextureSize, texturesize );
WriteLog( "Texture sizes capped at " + std::to_string( Global::iMaxTextureSize ) + " pixels" );
m_shadowbuffersize = Global::shadowtune.map_size;
m_shadowbuffersize = std::min( m_shadowbuffersize, texturesize );
WriteLog( "Shadows map size capped at " + std::to_string( m_shadowbuffersize ) + " pixels" );
}
// cap the number of supported lights based on hardware
{
GLint maxlights;
::glGetIntegerv( GL_MAX_LIGHTS, &maxlights );
Global::DynamicLightCount = std::min( Global::DynamicLightCount, maxlights - 1 );
WriteLog( "Dynamic light amount capped at " + std::to_string( Global::DynamicLightCount ) + " (" + std::to_string(maxlights) + " lights total supported by the gfx card)" );
}
{
GLint maxtextureunits;
::glGetIntegerv( GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxtextureunits );
if( maxtextureunits < 4 ) {
WriteLog( "Less than 4 texture units, shadow and reflection mapping will be disabled" );
Global::RenderShadows = false;
m_diffusetextureunit = GL_TEXTURE0;
m_shadowtextureunit = -1;
m_helpertextureunit = -1;
}
}
if( Global::iMultisampling ) {
WriteLog( "Using multisampling x" + std::to_string( 1 << Global::iMultisampling ) );
}
return true;