Campbell Barton
17a2820da8
Following the most widely used convention for including todo's in the code, that is: `TODO(name):`, `FIXME(name)` ... etc.
40 lines
1.1 KiB
GLSL
40 lines
1.1 KiB
GLSL
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/* NOTE: To be used with UNIFORM_RESOURCE_ID and INSTANCED_ATTR as define. */
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#pragma BLENDER_REQUIRE(common_view_lib.glsl)
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in vec4 pos; /* Position and radius. */
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/* ---- Instanced attribs ---- */
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in vec3 pos_inst;
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in vec3 nor;
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mat3 pointcloud_get_facing_matrix(vec3 p)
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{
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mat3 facing_mat;
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facing_mat[2] = normalize(ViewMatrixInverse[3].xyz - p);
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facing_mat[1] = normalize(cross(ViewMatrixInverse[0].xyz, facing_mat[2]));
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facing_mat[0] = cross(facing_mat[1], facing_mat[2]);
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return facing_mat;
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}
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/* Return world position and normal. */
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void pointcloud_get_pos_and_nor(out vec3 outpos, out vec3 outnor)
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{
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vec3 p = point_object_to_world(pos.xyz);
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mat3 facing_mat = pointcloud_get_facing_matrix(p);
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float radius = dot(abs(mat3(ModelMatrix) * pos.www), vec3(1.0 / 3.0));
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/* TODO(fclem): remove multiplication here. Here only for keeping the size correct for now. */
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radius *= 0.01;
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outpos = p + (facing_mat * pos_inst) * radius;
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outnor = facing_mat * nor;
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}
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vec3 pointcloud_get_pos(void)
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{
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vec3 outpos, outnor;
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pointcloud_get_pos_and_nor(outpos, outnor);
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return outpos;
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}
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