Differential D15817 Diff 55261 source/blender/draw/intern/shaders/draw_resource_finalize_comp.glsl

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source/blender/draw/intern/shaders/draw_resource_finalize_comp.glsl

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				/**
				* Finish computation of a few draw resource after sync.
				*/

				#pragma BLENDER_REQUIRE(common_math_lib.glsl)

				void main()
				{
				uint resource_id = gl_GlobalInvocationID.x;
				if (resource_id >= resource_len) {
				return;
				}

				mat4 model_mat = matrix_buf[resource_id].model;
				ObjectInfos infos = infos_buf[resource_id];
				ObjectBounds bounds = bounds_buf[resource_id];

				if (bounds.bounding_sphere.w != -1.0) {
				/* Convert corners to origin + sides in world space. */
				vec3 p0 = bounds.bounding_corners[0].xyz;
				vec3 p01 = bounds.bounding_corners[1].xyz - p0;
				vec3 p02 = bounds.bounding_corners[2].xyz - p0;
				vec3 p03 = bounds.bounding_corners[3].xyz - p0;
				/* Avoid flat box. */
				p01.x = max(p01.x, 1e-4);
				p02.y = max(p02.y, 1e-4);
				p03.z = max(p03.z, 1e-4);
				vec3 diagonal = p01 + p02 + p03;
				vec3 center = p0 + diagonal * 0.5;
				float min_axis = min_v3(abs(diagonal));
				bounds_buf[resource_id].bounding_sphere.xyz = transform_point(model_mat, center);
				/* We have to apply scaling to the diagonal. */
				bounds_buf[resource_id].bounding_sphere.w = length(transform_direction(model_mat, diagonal)) *
				0.5;
				bounds_buf[resource_id]._inner_sphere_radius = min_axis;
				bounds_buf[resource_id].bounding_corners[0].xyz = transform_point(model_mat, p0);
				bounds_buf[resource_id].bounding_corners[1].xyz = transform_direction(model_mat, p01);
				bounds_buf[resource_id].bounding_corners[2].xyz = transform_direction(model_mat, p02);
				bounds_buf[resource_id].bounding_corners[3].xyz = transform_direction(model_mat, p03);
				/* Always have correct handedness in the corners vectors. */
				if (flag_test(infos.flag, OBJECT_NEGATIVE_SCALE)) {
				bounds_buf[resource_id].bounding_corners[0].xyz +=
				bounds_buf[resource_id].bounding_corners[1].xyz;
				bounds_buf[resource_id].bounding_corners[1].xyz =
				-bounds_buf[resource_id].bounding_corners[1].xyz;
				}

				/* TODO: Bypass test for very large objects (see T67319). */
				if (bounds_buf[resource_id].bounding_sphere.w > 1e12) {
				bounds_buf[resource_id].bounding_sphere.w = -1.0;
				}
				}

				vec3 loc = infos.orco_add; /* Box center. */
				vec3 size = infos.orco_mul; /* Box half-extent. */
				/* This is what the original computation looks like.
				* Simplify to a nice MADD in shading code. */
				// orco = (pos - loc) / size;
				// orco = pos * (1.0 / size) + (-loc / size);
				vec3 size_inv = safe_rcp(size);
				infos_buf[resource_id].orco_add = -loc * size_inv;
				infos_buf[resource_id].orco_mul = size_inv;
				}
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