Justin Marshall
117 lines
5.8 KiB
Plaintext
117 lines
5.8 KiB
Plaintext
{
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parms {
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#ifdef PS3
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projectionMatrixZ.z projectionMatrixZ.z * 0.5 - 0.5
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#endif
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}
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state {
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depthfunc GL_ALWAYS
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depthmask
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alphamask
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twosided
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}
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hlsl_vp {
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result.position = vertex.position;
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}
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hlsl_fp {
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float2 tc = screenPosToTexcoord( fragment.position.xy, $positionToViewTexture );
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const float MAX_FLAT_DEPTH = 10.0; // maximum depth for two adjacent pixels to be considered in the same plane
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const float MIN_CRACK_DEPTH = 100.0; // a pixel is considered a crack if it's depth increases this much between two adjacent pixels
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const float MAX_CRACK_DISTANCE = 500.0; // don't look for cracks beyond this point because small far away adjacent geometry will appear as cracks
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float3 foundCrack = _float3( 0.0 );
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for ( float x = -4.0; x <= 4.0; x += 1.0 ) {
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for ( float y = -4.0; y <= 4.0; y += 1.0 ) {
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float2 localTC = tc + float2( x, y ) * $positionToViewTexture.zw;
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float centerDepth = tex2Ddepth( $spare1Map, localTC );
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float4 surroundingDepth;
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surroundingDepth.x = tex2Ddepth( $spare1Map, localTC + float2( +1, 0 ) * $positionToViewTexture.zw );
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surroundingDepth.y = tex2Ddepth( $spare1Map, localTC + float2( 0, +1 ) * $positionToViewTexture.zw );
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surroundingDepth.z = tex2Ddepth( $spare1Map, localTC + float2( -1, 0 ) * $positionToViewTexture.zw );
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surroundingDepth.w = tex2Ddepth( $spare1Map, localTC + float2( 0, -1 ) * $positionToViewTexture.zw );
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#if defined( PS3 )
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float centerClipZ = ( centerDepth - 0.5 ) * $projectionMatrixZ.w / ( centerDepth + $projectionMatrixZ.z );
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float4 surroundingClipZ = ( surroundingDepth - 0.5 ) * $projectionMatrixZ.w / ( surroundingDepth + $projectionMatrixZ.z );
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#elif defined( XBOX )
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float centerClipZ = -( $projectionMatrixZ.w / ( -centerDepth - $projectionMatrixZ.z ) ) * centerDepth;
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float4 surroundingClipZ = -( $projectionMatrixZ.w / ( -surroundingDepth - $projectionMatrixZ.z ) ) * surroundingDepth;
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#else
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centerDepth = centerDepth * 2.0 - 1.0;
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surroundingDepth = surroundingDepth * 2.0 - 1.0;
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float centerClipZ = -( $projectionMatrixZ.w / ( -centerDepth - $projectionMatrixZ.z ) ) * centerDepth;
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float4 surroundingClipZ = -( $projectionMatrixZ.w / ( -surroundingDepth - $projectionMatrixZ.z ) ) * surroundingDepth;
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#endif
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float minClipX = min( surroundingClipZ.x, surroundingClipZ.z );
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float minClipY = min( surroundingClipZ.y, surroundingClipZ.w );
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float minClipZ = min( minClipX, minClipY );
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float2 averageSurroundingClipZ = ( surroundingClipZ.xy + surroundingClipZ.zw ) * 0.5;
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if ( abs( averageSurroundingClipZ.x - surroundingClipZ.x ) < MAX_FLAT_DEPTH &&
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centerClipZ - averageSurroundingClipZ.x > MIN_CRACK_DEPTH && averageSurroundingClipZ.x < MAX_CRACK_DISTANCE ) {
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foundCrack = float3( localTC.x, localTC.y, minClipZ );
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}
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if ( abs( averageSurroundingClipZ.y - surroundingClipZ.y ) < MAX_FLAT_DEPTH &&
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centerClipZ - averageSurroundingClipZ.y > MIN_CRACK_DEPTH && averageSurroundingClipZ.y < MAX_CRACK_DISTANCE ) {
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foundCrack = float3( localTC.x, localTC.y, minClipZ );
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}
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}
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}
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if ( foundCrack.z != 0.0 ) {
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for ( float x = -16.0; x <= 16.0; x += 4.0 ) {
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for ( float y = -16.0; y <= 16.0; y += 4.0 ) {
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float2 localTC = foundCrack.xy + float2( x, y ) * $positionToViewTexture.zw;
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float centerDepth = tex2Ddepth( $spare1Map, localTC );
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float4 surroundingDepth;
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surroundingDepth.x = tex2Ddepth( $spare1Map, localTC + float2( +1, 0 ) * $positionToViewTexture.zw );
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surroundingDepth.y = tex2Ddepth( $spare1Map, localTC + float2( 0, +1 ) * $positionToViewTexture.zw );
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surroundingDepth.z = tex2Ddepth( $spare1Map, localTC + float2( -1, 0 ) * $positionToViewTexture.zw );
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surroundingDepth.w = tex2Ddepth( $spare1Map, localTC + float2( 0, -1 ) * $positionToViewTexture.zw );
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#if defined( PS3 )
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float centerClipZ = ( centerDepth - 0.5 ) * $projectionMatrixZ.w / ( centerDepth + $projectionMatrixZ.z );
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float4 surroundingClipZ = ( surroundingDepth - 0.5 ) * $projectionMatrixZ.w / ( surroundingDepth + $projectionMatrixZ.z );
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#elif defined( XBOX )
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float centerClipZ = -( $projectionMatrixZ.w / ( -centerDepth - $projectionMatrixZ.z ) ) * centerDepth;
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float4 surroundingClipZ = -( $projectionMatrixZ.w / ( -surroundingDepth - $projectionMatrixZ.z ) ) * surroundingDepth;
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#else
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centerDepth = centerDepth * 2.0 - 1.0;
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surroundingDepth = surroundingDepth * 2.0 - 1.0;
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float centerClipZ = -( $projectionMatrixZ.w / ( -centerDepth - $projectionMatrixZ.z ) ) * centerDepth;
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float4 surroundingClipZ = -( $projectionMatrixZ.w / ( -surroundingDepth - $projectionMatrixZ.z ) ) * surroundingDepth;
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#endif
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float2 averageSurroundingClipZ = ( surroundingClipZ.xy + surroundingClipZ.zw ) * 0.5;
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if ( abs( averageSurroundingClipZ.x - surroundingClipZ.x ) < MAX_FLAT_DEPTH &&
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centerClipZ - averageSurroundingClipZ.x > MIN_CRACK_DEPTH && averageSurroundingClipZ.x < MAX_CRACK_DISTANCE ) {
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} else if ( abs( averageSurroundingClipZ.y - surroundingClipZ.y ) < MAX_FLAT_DEPTH &&
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centerClipZ - averageSurroundingClipZ.y > MIN_CRACK_DEPTH && averageSurroundingClipZ.y < MAX_CRACK_DISTANCE ) {
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} else if ( centerClipZ > foundCrack.z + MIN_CRACK_DEPTH ) {
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foundCrack.z = 0.0;
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}
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}
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}
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}
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if ( foundCrack.z != 0.0 ) {
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result.color = float4( 1.0, 0.25, 0.25, 1.0 );
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} else {
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float centerDepth = tex2Ddepth( $spare1Map, tc );
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#if defined( PS3 )
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float centerClipZ = ( centerDepth - 0.5 ) * $projectionMatrixZ.w / ( centerDepth + $projectionMatrixZ.z );
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#elif defined( XBOX )
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float centerClipZ = -( $projectionMatrixZ.w / ( -centerDepth - $projectionMatrixZ.z ) ) * centerDepth;
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#else
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centerDepth = centerDepth * 2.0 - 1.0;
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float centerClipZ = -( $projectionMatrixZ.w / ( -centerDepth - $projectionMatrixZ.z ) ) * centerDepth;
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#endif
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result.color = _float4( centerClipZ / 1000 );
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}
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}
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} |