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Code Issues 123 Wiki Activity

scale/endscale/localscale per node model

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Hirek
2026-05-10 13:12:49 +02:00
parent 587077629f
commit 3419666070
9 changed files with 277 additions and 31 deletions
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11
gl/glsl_common.cpp
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@@ -99,9 +99,14 @@ void gl::glsl_common_setup()
return instance_modelview[gl_InstanceID] * modelview;
}
mat3 effective_modelviewnormal() {
// instance_modelview is rotation+translation only (no scale), so its
// upper-3x3 is its own inverse-transpose (rotation matrix).
return mat3(instance_modelview[gl_InstanceID]) * modelviewnormal;
// instance_modelview can include per-instance scale (uniform or per-axis),
// so its upper-3x3 is NOT its own inverse-transpose in the non-uniform
// case. Compute the correct normal matrix via transpose(inverse(...)).
// For pure rotation+translation this still produces the rotation matrix
// (one extra mat3 inverse per vertex — modern GPUs handle it cheaply).
mat3 instance_mv3 = mat3(instance_modelview[gl_InstanceID]);
mat3 instance_normal = transpose(inverse(instance_mv3));
return instance_normal * modelviewnormal;
}
#endif