Revision 33f59f22
Added by Leszek Koltunski almost 6 years ago
| src/main/res/raw/oit_render_fragment_shader.glsl | ||
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| 24 | 24 |
in vec2 v_TexCoordinate; // Interpolated texture coordinate per fragment. |
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in vec2 v_Pixel; // location of the current fragment, in pixels |
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uniform sampler2D u_Texture; |
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uniform sampler2D u_DepthTexture; |
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////////////////////////////////////////////////////////////////////////////////////////////// |
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// per-pixel linked list. Order Independent Transparency. |
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|
| ... | ... | |
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} |
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////////////////////////////////////////////////////////////////////////////////////////////// |
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// Pass3 of the OIT algorithm - traverse the per-pixel LinkedList and build the final color.
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// Pass4 of the OIT algorithm - keep traversing the linked list, build the final color and blend it.
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void main() |
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{
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float texdepth = texture(u_DepthTexture, v_TexCoordinate).r; |
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vec4 color = texture(u_Texture , v_TexCoordinate); |
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uint index = uint(v_Pixel.x + v_Pixel.y * u_Size.x); |
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uint curr = u_Records[index]; |
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uint prev = uint(v_Pixel.x + v_Pixel.y * u_Size.x); |
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uint curr = u_Records[prev]; |
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if (curr != 0u) |
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{
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const float S= 2147483647.0; |
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uint depth = u_Records[curr+1u]; |
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uint texdepthuint = uint(S*(1.0-texdepth)/2.0); |
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texdepth = 1.0 -2.0*float(depth)/S; |
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gl_FragDepth = 1.0 - 2.0*float(u_Records[curr+1u])/S; |
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vec4 color = convert(u_Records[curr+2u]); |
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if( depth >= texdepthuint )
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while (curr != 0u)
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{
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vec4 clr= convert(u_Records[curr+2u]); |
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curr = u_Records[curr]; |
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while (curr > 0u) |
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{
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depth= u_Records[curr+1u]; // keep walking the linked list |
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if( depth < texdepthuint ) break; // until we reach scene depth |
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clr= blend( clr, convert(u_Records[curr+2u]) ); // and blending the colors in |
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curr = u_Records[curr]; |
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} |
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color = blend( clr, color); |
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color = blend( color , convert(u_Records[curr+2u]) ); |
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} |
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} |
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gl_FragDepth = texdepth; |
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fragColor = color; |
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fragColor = color; |
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} |
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else discard; |
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} |
Also available in: Unified diff
OIT: move towards 4 passes ( clear - build - collapse - render )