Brecht Van Lommel
c813a1b358
With (center) position, radius and random value outputs. Eevee does not yet support rendering point clouds, but an untested implementation of this node was added for when it does. Ref T92573
53 lines
1.3 KiB
GLSL
53 lines
1.3 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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#ifndef DRW_SHADER_SHARED_H
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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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#endif
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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] = cameraVec(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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/* Returns world center position and radius. */
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void pointcloud_get_pos_and_radius(out vec3 outpos, out float outradius)
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{
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outpos = point_object_to_world(pos.xyz);
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outradius = dot(abs(mat3(ModelMatrix) * pos.www), vec3(1.0 / 3.0));
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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;
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float radius;
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pointcloud_get_pos_and_radius(p, radius);
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mat3 facing_mat = pointcloud_get_facing_matrix(p);
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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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