Differential D6296 Diff 20005 source/blender/draw/engines/overlay/shaders/particle_vert.glsl

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				uniform sampler1D weightTex;
				uniform vec4 color; /* Drawsize packed in alpha */

				/* ---- Instantiated Attrs ---- */
				in vec3 pos;
				in int vclass;

				/* ---- Per instance Attrs ---- */
				in vec3 part_pos;
				in vec4 part_rot;
				in float part_val;

				#ifdef USE_DOTS
				out vec4 finalColor;
				#else
				flat out vec4 finalColor;
				#endif

				#define VCLASS_SCREENALIGNED (1 << 9)

				#define VCLASS_EMPTY_AXES (1 << 11)

				vec3 rotate(vec3 vec, vec4 quat)
				{
				/* The quaternion representation here stores the w component in the first index */
				return vec + 2.0 * cross(quat.yzw, cross(quat.yzw, vec) + quat.x * vec);
				}

				void main()
				{
				float draw_size = color.a;

				vec3 world_pos = part_pos;

				#ifdef USE_DOTS
				gl_Position = point_world_to_ndc(world_pos);
				/* World sized points. */
				gl_PointSize = sizePixel * draw_size * ProjectionMatrix[1][1] * sizeViewport.y / gl_Position.w;
				#else

				if ((vclass & VCLASS_SCREENALIGNED) != 0) {
				/* World sized, camera facing geometry. */
				world_pos += (screenVecs[0].xyz * pos.x + screenVecs[1].xyz * pos.y) * draw_size;
				}
				else {
				world_pos += rotate(pos, part_rot) * draw_size;
				}

				gl_Position = point_world_to_ndc(world_pos);
				#endif

				/* Coloring */
				if ((vclass & VCLASS_EMPTY_AXES) != 0) {
				/* see VBO construction for explanation. */
				finalColor = vec4(clamp(pos * 10000.0, 0.0, 1.0), 1.0);
				}
				else if (part_val < 0.0) {
				finalColor = vec4(color.rgb, 1.0);
				}
				else {
				finalColor = vec4(texture(weightTex, part_val).rgb, 1.0);
				}

				#ifdef USE_WORLD_CLIP_PLANES
				world_clip_planes_calc_clip_distance(world_pos);
				#endif
				}