Revision 8376b7d1
Added by Leszek Koltunski over 3 years ago
| src/main/java/org/distorted/library/effect/VertexEffectDistort.java | ||
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| 131 | 131 |
+ "vec4 region= vUniforms[effect+2]; \n" |
| 132 | 132 |
+ "float d = degree(region,ps); \n" |
| 133 | 133 |
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| 134 |
+ "v += d*force; \n" |
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| 134 |
+ "if( d>0.0 ) \n" |
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| 135 |
+ " { \n"
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| 136 |
+ " v += d*force; \n" |
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| 135 | 137 |
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| 136 |
+ "float tp = 1.0+n.z; \n"
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| 137 |
+ "float tr = 1.0 / (tp - (sign(tp)-1.0)); \n" // proper way to compute 1/x is
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| 138 |
+ " float tp = 1.0+n.z; \n"
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+ " float tr = 1.0 / (tp - (sign(tp)-1.0)); \n" // proper way to compute 1/x is
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| 138 | 140 |
// 1/(x-(sign(x)-1)) and NOT 1/(x+1-sign(x)) |
| 139 | 141 |
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| 140 |
+ "float ap = ps.x*n.z - ps.z*n.x; \n" // rotate the ps vector
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| 141 |
+ "float bp = ps.y*n.z - ps.z*n.y; \n" //
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| 142 |
+ "float cp =(ps.x*n.y - ps.y*n.x)*tr; \n" //
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| 143 |
+ "vec3 psRot = vec3( ap+n.y*cp , bp-n.x*cp , dot(ps,n) ); \n" //
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| 142 |
+ " float ap = ps.x*n.z - ps.z*n.x; \n" // rotate the ps vector
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| 143 |
+ " float bp = ps.y*n.z - ps.z*n.y; \n" //
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| 144 |
+ " float cp =(ps.x*n.y - ps.y*n.x)*tr; \n" //
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+ " vec3 psRot = vec3( ap+n.y*cp , bp-n.x*cp , dot(ps,n) ); \n" //
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| 144 | 146 |
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+ "float len = length(psRot); \n"
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+ "float corr= sign(len)-1.0; \n" // make N (0,0,1) if ps=(0,0,0)
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+ "vec3 N = vec3( -dot(force,n)*psRot.xy, region.w*len-corr ); \n" // modified rotated normal
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| 147 |
+ " float len = length(psRot); \n"
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| 148 |
+ " float corr= sign(len)-1.0; \n" // make N (0,0,1) if ps=(0,0,0)
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| 149 |
+ " vec3 N = vec3( -dot(force,n)*psRot.xy, region.w*len-corr ); \n" // modified rotated normal
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| 148 | 150 |
// dot(force,n) is rotated force.z |
| 149 |
+ "float an = N.x*n.z + N.z*n.x; \n" // now create the normal vector
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+ "float bn = N.y*n.z + N.z*n.y; \n" // back from our modified normal
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+ "float cn =(N.x*n.y - N.y*n.x)*tr; \n" // rotated back
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| 152 |
+ "n = vec3( an+n.y*cn , bn-n.x*cn , -N.x*n.x-N.y*n.y+N.z*n.z); \n" // notice 4 signs change!
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| 151 |
+ " float an = N.x*n.z + N.z*n.x; \n" // now create the normal vector
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| 152 |
+ " float bn = N.y*n.z + N.z*n.y; \n" // back from our modified normal
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| 153 |
+ " float cn =(N.x*n.y - N.y*n.x)*tr; \n" // rotated back
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| 154 |
+ " n = vec3( an+n.y*cn , bn-n.x*cn , -N.x*n.x-N.y*n.y+N.z*n.z);\n" // notice 4 signs change!
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| 153 | 155 |
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+ " n = normalize(n); \n"; |
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+ " n = normalize(n); \n" |
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+ " }"; |
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| 155 | 158 |
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| 156 | 159 |
} |
| 157 | 160 |
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Also available in: Unified diff
Fix the fact that Distort was rotating normals outside of its region!