93 lines
2.3 KiB
PHP
93 lines
2.3 KiB
PHP
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//
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// GLSL code common to both megatexture GLSL ambient.rprog and interaction.rprog
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//
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vec4 R1, R2, R3, R4, R5, R6;
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vec4 mask1;
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// Calculate megatexture masks using maths
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R1 = abs(texcoord3);
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R2 = abs(texcoord4);
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// megaMask parameters packing in the vertex shader saves one pixel shader instruction
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R1 = max(R1, R2);
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mask1 = clamp((-32.0*R1)+16.0, 0.0, 1.0);
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// load the minimum quality image first, which will be used
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// if none of the other textures have a valid mask
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vec2 scaled = texcoord7.xy;
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$if ( r_shaderQuality < 1 )
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if (mask1.w==1.0)
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{
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R5.xy = scaled * megatextureparams_4.xy;
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combined = texture2D(megatexturelevel_4, R5.xy);
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//combined = vec4(0, 1, 0, 1);
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}
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else
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$endif
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if (mask1.x==0.0)
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{
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R1.xy = scaled * megatextureparams_0.xy;
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combined = texture2D(megatexturelevel_0, R1.xy);
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}
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else
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{
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// load the multi-resolution textures and sum up with the masks
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if ( mask1.y < 1.0) {
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if (mask1.x < 1.0) {
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R1.xy = scaled * $megaTextureParams_0.xy;
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R1 = texture2D($megaTextureLevel_0, R1.xy); // lowest quality moving image
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R2.xy = scaled * $megaTextureParams_1.xy;
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R2 = texture2D($megaTextureLevel_1, R2.xy);
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combined = R1;
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combined = mix(combined, R2, mask1.x);
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}
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else {
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R2.xy = scaled * $megaTextureParams_1.xy;
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R2 = texture2D($megaTextureLevel_1, R2.xy);
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combined = R2;
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if ( mask1.y > 0.0) {
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R3.xy = scaled * $megaTextureParams_2.xy;
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R3 = texture2D($megaTextureLevel_2, R3.xy);
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combined = mix(combined, R3, mask1.y);
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}
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}
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}
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else {
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if ( mask1.z < 1.0) {
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R3.xy = scaled * $megaTextureParams_2.xy;
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R3 = texture2D($megaTextureLevel_2, R3.xy);
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combined = R3;
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if ( mask1.z > 0.0) {
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R4.xy = scaled * $megaTextureParams_3.xy;
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R4 = texture2D($megaTextureLevel_3, R4.xy);
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combined = mix(combined, R4, mask1.z);
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}
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}
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else {
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R4.xy = scaled * $megaTextureParams_3.xy;
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R4 = texture2D($megaTextureLevel_3, R4.xy);
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combined = R4;
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if ( mask1.w > 0.0) {
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R5.xy = scaled * $megaTextureParams_4.xy;
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R5 = texture2D($megaTextureLevel_4, R5.xy);
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combined = mix(combined, R5, mask1.w);
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}
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}
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}
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}
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// Modulate with diffuse color
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combined.xyz = combined.xyz * $diffuseColor.xyz;
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