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0032172: Visualization, TKOpenGl - implement simple shadow mapping for a spot light source

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added test: opengl/data/shadows/spotlight
This commit is contained in:
mzernova
2022-08-24 15:04:10 +03:00
parent acac44d571
commit 06aa200142
14 changed files with 143 additions and 54 deletions
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4
src/Shaders/FILES
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@@ -1,6 +1,6 @@
srcinc:::Declarations.glsl
srcinc:::DeclarationsImpl.glsl
srcinc:::DirectionalLightShadow.glsl
srcinc:::LightShadow.glsl
srcinc:::PBRCookTorrance.glsl
srcinc:::PBRDirectionalLight.glsl
srcinc:::PBRDistribution.glsl
@@ -27,7 +27,7 @@ srcinc:::TangentSpaceNormal.glsl
srcinc:::SkydomBackground.fs
Shaders_Declarations_glsl.pxx
Shaders_DeclarationsImpl_glsl.pxx
Shaders_DirectionalLightShadow_glsl.pxx
Shaders_LightShadow_glsl.pxx
Shaders_Display_fs.pxx
Shaders_PBRCookTorrance_glsl.pxx
Shaders_PBRDirectionalLight_glsl.pxx

8
src/Shaders/DirectionalLightShadow.glsl → src/Shaders/LightShadow.glsl
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@@ -9,10 +9,10 @@ const vec2 occPoissonDisk16[16] = vec2[](
);
#endif
//! Function computes directional light shadow attenuation (1.0 means no shadow).
float occDirectionalLightShadow (in sampler2D theShadow,
in int theId,
in vec3 theNormal)
//! Function computes directional and spot light shadow attenuation (1.0 means no shadow).
float occLightShadow (in sampler2D theShadow,
in int theId,
in vec3 theNormal)
{
vec4 aPosLightSpace = PosLightSpace[occLight_Index(theId)];
vec3 aLightDir = occLight_Position (theId);

5
src/Shaders/PBRSpotLight.glsl
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@@ -9,7 +9,8 @@ void occSpotLight (in int theId,
in vec3 theNormal,
in vec3 theView,
in vec3 thePoint,
in bool theIsFront)
in bool theIsFront,
in float theShadow)
{
vec3 aLight = occLight_Position (theId) - thePoint;
@@ -40,5 +41,5 @@ void occSpotLight (in int theId,
DirectLighting += occPBRIllumination (theView, aLight, theNormal,
BaseColor, Metallic, Roughness, IOR,
occLight_Specular(theId),
occLight_Intensity(theId) * anAtten);
occLight_Intensity(theId) * anAtten) * theShadow;
}

8
src/Shaders/PhongSpotLight.glsl
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@@ -5,11 +5,13 @@
//! @param theView view direction
//! @param thePoint 3D position (world space)
//! @param theIsFront front/back face flag
//! @param theShadow the value from shadow map
void occSpotLight (in int theId,
in vec3 theNormal,
in vec3 theView,
in vec3 thePoint,
in bool theIsFront)
in bool theIsFront,
in float theShadow)
{
vec3 aLight = occLight_Position (theId) - thePoint;
@@ -45,6 +47,6 @@ void occSpotLight (in int theId,
aSpecl = pow (aNdotH, occMaterial_Shininess (theIsFront));
}
Diffuse += occLight_Diffuse (theId) * aNdotL * anAtten;
Specular += occLight_Specular(theId) * aSpecl * anAtten;
Diffuse += occLight_Diffuse (theId) * aNdotL * anAtten * theShadow;
Specular += occLight_Specular(theId) * aSpecl * anAtten * theShadow;
}

12
src/Shaders/Shaders_DirectionalLightShadow_glsl.pxx → src/Shaders/Shaders_LightShadow_glsl.pxx
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@@ -1,6 +1,6 @@
// This file has been automatically generated from resource file src/Shaders/DirectionalLightShadow.glsl
// This file has been automatically generated from resource file src/Shaders/LightShadow.glsl
static const char Shaders_DirectionalLightShadow_glsl[] =
static const char Shaders_LightShadow_glsl[] =
"#if (__VERSION__ >= 120)\n"
"//! Coefficients for gathering close samples for antialiasing.\n"
"//! Use only with decent OpenGL (array constants cannot be initialized with GLSL 1.1 / GLSL ES 1.1)\n"
@@ -12,10 +12,10 @@ static const char Shaders_DirectionalLightShadow_glsl[] =
");\n"
"#endif\n"
"\n"
"//! Function computes directional light shadow attenuation (1.0 means no shadow).\n"
"float occDirectionalLightShadow (in sampler2D theShadow,\n"
" in int theId,\n"
" in vec3 theNormal)\n"
"//! Function computes directional and spot light shadow attenuation (1.0 means no shadow).\n"
"float occLightShadow (in sampler2D theShadow,\n"
" in int theId,\n"
" in vec3 theNormal)\n"
"{\n"
" vec4 aPosLightSpace = PosLightSpace[occLight_Index(theId)];\n"
" vec3 aLightDir = occLight_Position (theId);\n"

5
src/Shaders/Shaders_PBRSpotLight_glsl.pxx
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@@ -12,7 +12,8 @@ static const char Shaders_PBRSpotLight_glsl[] =
" in vec3 theNormal,\n"
" in vec3 theView,\n"
" in vec3 thePoint,\n"
" in bool theIsFront)\n"
" in bool theIsFront,\n"
" in float theShadow)\n"
"{\n"
" vec3 aLight = occLight_Position (theId) - thePoint;\n"
"\n"
@@ -43,5 +44,5 @@ static const char Shaders_PBRSpotLight_glsl[] =
" DirectLighting += occPBRIllumination (theView, aLight, theNormal,\n"
" BaseColor, Metallic, Roughness, IOR,\n"
" occLight_Specular(theId),\n"
" occLight_Intensity(theId) * anAtten);\n"
" occLight_Intensity(theId) * anAtten) * theShadow;\n"
"}\n";

8
src/Shaders/Shaders_PhongSpotLight_glsl.pxx
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@@ -8,11 +8,13 @@ static const char Shaders_PhongSpotLight_glsl[] =
"//! @param theView view direction\n"
"//! @param thePoint 3D position (world space)\n"
"//! @param theIsFront front/back face flag\n"
"//! @param theShadow the value from shadow map\n"
"void occSpotLight (in int theId,\n"
" in vec3 theNormal,\n"
" in vec3 theView,\n"
" in vec3 thePoint,\n"
" in bool theIsFront)\n"
" in bool theIsFront,\n"
" in float theShadow)\n"
"{\n"
" vec3 aLight = occLight_Position (theId) - thePoint;\n"
"\n"
@@ -48,6 +50,6 @@ static const char Shaders_PhongSpotLight_glsl[] =
" aSpecl = pow (aNdotH, occMaterial_Shininess (theIsFront));\n"
" }\n"
"\n"
" Diffuse += occLight_Diffuse (theId) * aNdotL * anAtten;\n"
" Specular += occLight_Specular(theId) * aSpecl * anAtten;\n"
" Diffuse += occLight_Diffuse (theId) * aNdotL * anAtten * theShadow;\n"
" Specular += occLight_Specular(theId) * aSpecl * anAtten * theShadow;\n"
"}\n";