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cc8cbabe5c
Graphic3d_AspectFillArea3d now stores array of textures. Graphic3d_TextureParams stores texture unit for mapping texture. OpenGl_Context::BindTextures() - context now manages the set of active textures. Related code has been removed from OpenGl_Workspace. OpenGl_Sampler has been extended to hold texture parameters structure. OpenGl_Texture now holds OpenGl_Sampler instance as class field. OpenGl_Texture inherits new class OpenGl_NamedResource and holds texture identifier used for sharing resource in OpenGl_Context. OpenGl_RaytraceGeometry now creates bindless textures taking Sampler object directly from OpenGl_Texture. OpenGl_Context::BindTextures() automatically recreates immutable Sampler Object on texture parameters change. Declared new structure OpenGl_ArbSamplerObject for platform-neutral usage of related functionality. Related functions are now loaded within OpenGL ES 3.0+. Declarations.glsl - occActiveSampler has been renamed to occSampler0 with aliases occSamplerBaseColor (main) and occActiveSampler (for compatibility). Additional texture samplers should be declared explicitly within specific GLSL program as occSampler1, occSampler2, etc. AIS_Shape and AIS_ColoredShape now computes Shaded presentation with UV coordinates if texture mapping is enabled in Drawer. vshaderprog now accepts Shader source code as parameter.
41 lines
1.2 KiB
Plaintext
41 lines
1.2 KiB
Plaintext
puts "========"
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puts "0028912: Visualization, TKOpenGl - multi-texture support"
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puts "========"
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pload MODELING VISUALIZATION
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set aShaderVert "
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THE_SHADER_OUT vec2 TexCoord;
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void main() {
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TexCoord = occTexCoord.st;
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gl_Position = occProjectionMatrix * occWorldViewMatrix * occModelWorldMatrix * occVertex;
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}"
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set aShaderFrag "
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uniform sampler2D occSampler1;
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uniform sampler2D occSampler2;
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uniform sampler2D occSampler3;
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THE_SHADER_IN vec2 TexCoord;
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void main() {
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if (TexCoord.s < 0.5 && TexCoord.t < 0.5) { occFragColor = occTexture2D(occSampler0, TexCoord.st); }
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else if (TexCoord.s < 0.5 && TexCoord.t >= 0.5) { occFragColor = occTexture2D(occSampler1, TexCoord.st); }
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else if (TexCoord.s >= 0.5 && TexCoord.t < 0.5) { occFragColor = occTexture2D(occSampler2, TexCoord.st); }
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else { occFragColor = occTexture2D(occSampler3, TexCoord.st); }
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}"
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# draw a box
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box b 1 2 3
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vclear
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vinit View1
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vaxo
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vdisplay -dispMode 1 b
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vfit
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vrotate 0.2 0.0 0.0
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# take snapshot with built-in shader
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vtexture b -tex0 3 -tex1 4 -tex2 5 -tex3 6
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vdump $::imagedir/${::casename}_normal.png
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vshaderprog b $aShaderVert $aShaderFrag
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vdump $::imagedir/${::casename}_multi.png
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