mirror of https://github.com/bkaradzic/bgfx
46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
$input a_position
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$output v_lightCenterScale, v_color0
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/*
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* Copyright 2016 Joseph Cherlin. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
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*/
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#include "../common/common.sh"
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uniform vec4 u_sphereInfo;
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uniform mat4 u_invMvpShadow;
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// Note texture binding starts at slot 2. Problem is that vert textures and frag textures are different.
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SAMPLER2D(s_shadowMap, 2); // Used to reconstruct 3d position for lights
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SAMPLER2D(s_rsm, 3); // Reflective shadow map, used to scale/color light
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void main()
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{
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// Calculate vertex position
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vec3 objectSpacePos = a_position;
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vec2 texCoord = u_sphereInfo.xy;
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// Get world position using the shadow map
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float deviceDepth = texture2DLod(s_shadowMap, texCoord, 0).x;
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float depth = toClipSpaceDepth(deviceDepth);
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vec3 clip = vec3(texCoord * 2.0 - 1.0, depth);
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#if !BGFX_SHADER_LANGUAGE_GLSL
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clip.y = -clip.y;
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#endif // !BGFX_SHADER_LANGUAGE_GLSL
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vec3 wPos = clipToWorld(u_invMvpShadow, clip);
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wPos.y -= 0.001; // Would be much better to perturb in normal direction, but I didn't do that.
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// Scale and color are already in the rsm
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vec4 rsm = texture2DLod(s_rsm, texCoord, 0).xyzw;
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float radScale = u_sphereInfo.z;
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float rad = rsm.w * radScale;
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gl_Position = mul(u_viewProj, vec4(wPos+objectSpacePos*rad, 1.0) );
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v_lightCenterScale.xyz = wPos.xyz;
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v_lightCenterScale.w = rad;
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v_color0.xyz = rsm.xyz;
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}
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