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60 lines
1.5 KiB
GLSL
60 lines
1.5 KiB
GLSL
#version 450
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#extension GL_ARB_separate_shader_objects : enable
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#extension GL_ARB_shading_language_420pack : enable
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// In vulkan is possible separate uniform blocks... also if there is no differences (in this case) with new GPUs:
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// e.g. with RTX3080 & 5xx drivers minBlockSize = 512 byte
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// ... only on "very old" AMD RX580 minBlockSize was 80 byte
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#ifdef VULKAN_BUILD
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layout (std140, binding = 1) uniform uBuffer
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{
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vec4 lightPos;
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vec4 PoV;
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} u;
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#else
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layout (std140, binding = 0) uniform uBuffer
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{
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mat4 pMat;
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mat4 vMat;
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mat4 mMat;
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mat4 cMat;
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mat4 lMat;
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vec3 lightPos;
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vec3 PoV;
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} u;
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#endif
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layout (location = 0) in vsOut {
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vec4 vsColor;
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vec4 vsNormal;
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vec4 vsPos;
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float shininessExp;
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};
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layout (location = 0) out vec4 outColor;
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const float ambientInt = 0.925;
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const float specularInt = 1.;
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#define USE_BLINN_PHONG
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void main()
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{
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vec3 V = normalize(u.PoV.xyz + vsPos.xyz);
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vec3 L = normalize(u.lightPos.xyz - vsPos.xyz);
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vec3 N = normalize(vsNormal.xyz);
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#ifdef USE_BLINN_PHONG
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vec3 H = normalize(L - V); // Half(angle)Vec
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float specular = pow(max(0.0, dot(H, N)), shininessExp);
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#else // Phong
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vec3 R = reflect(L, N);
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float specular = pow(max(0.0, dot(R, V)), shininessExp);
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#endif
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float diffuse = max(0.0, dot(N, L))*2.0;
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outColor = vec4(vsColor.rgb * (ambientInt + diffuse) + vec3(specular * specularInt), 1.0);
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outColor = min(vec4(1.0), outColor);
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}
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