Clément Foucault
058514aa0a
Also includes outline overlays. Removes the temp overlay drawing We make the geometry follow camera like billboards this uses less geometry. Currently we use half octahedron for now. Goal would be to use icospheres. This patch also optimize the case when pointcloud has uniform radius. However we should premultiply the radius prop by the default radius beforehand to avoid a multiplication on CPU. Using geometry instead of pseudo raytraced spheres is more scalable as we can render as low as 1 or 2 triangle to a full half sphere and can integrate easily in the render pipeline using a low amount of code. Reviewed By: brecht Differential Revision: https://developer.blender.org/D8301
39 lines
1.1 KiB
GLSL
39 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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} |