Differential D2914 Diff 9557 source/blender/gpu/shaders/gpu_shader_instance_mball_helpers_vert.glsl

Changeset View

Standalone View


				/* This shader takes a 2D shape, puts it in 3D Object space such that is stays aligned with view,
				* and scales the shape according to per-instance attributes
				* Note that if the stiffness is zero, it assumes the scale is directly multiplied by the radius */


				#define M_PI_2 1.570796f // pi/2

				uniform mat4 ViewProjectionMatrix;
				uniform vec3 screen_vecs[2];

				/* ---- Instanciated Attribs ---- */
				in vec2 pos;

				/* ---- Per instance Attribs ---- */
				in mat3x4 ScaleTranslationMatrix;
				in float radius;
				in vec3 color;

				flat out vec4 finalColor;

				void main()
				{
				mat3 Scamat = mat3(ScaleTranslationMatrix);
				vec4 world_pos = vec4(
				ScaleTranslationMatrix[0][3],
				ScaleTranslationMatrix[1][3],
				ScaleTranslationMatrix[2][3],
				1.0);

				vec3 screen_pos = screen_vecs[0].xyz * pos.x + screen_vecs[1].xyz * pos.y;
				world_pos.xyz += Scamat * (screen_pos * radius);

				gl_Position = ViewProjectionMatrix * world_pos;
				finalColor = vec4(color, 1.0);
				}