Armature: Rename bone shaders and add 2 colors smooth blending.

This will enable us to do more nice stuff in future commits.

This commit is a temporary commit, it will compile but will crash if
trying to display any armature. Next commit does work.

1 files changed, 37 insertions, 0 deletions

diff --git a/source/blender/draw/modes/shaders/armature_shape_solid_vert.glsl b/source/blender/draw/modes/shaders/armature_shape_solid_vert.glsl
new file mode 100644
index 00000000000..701fc9c38ab
--- /dev/null
+++ b/source/blender/draw/modes/shaders/armature_shape_solid_vert.glsl
@@ -0,0 +1,37 @@
+
+uniform mat3 NormalMatrix;
+uniform mat4 ViewMatrixInverse;
+uniform mat4 ViewProjectionMatrix;
+
+uniform mat4 ViewMatrix;
+uniform mat4 ProjectionMatrix;
+uniform vec2 viewportSize;
+
+/* ---- Instanciated Attribs ---- */
+in vec3 pos;
+in vec3 nor;
+
+/* ---- Per instance Attribs ---- */
+in mat4 InstanceModelMatrix;
+in vec3 boneColor;
+in vec3 stateColor;
+
+flat out vec4 finalColor;
+
+void main()
+{
+	mat3 NormalMatrix = transpose(inverse(mat3(ViewMatrix * InstanceModelMatrix)));
+	vec3 normal = normalize(NormalMatrix * nor);
+
+	/* Do lighting at an angle to avoid flat shading on front facing bone. */
+	const vec3 light = vec3(0.1, 0.1, 0.8);
+	float n = dot(normal, light);
+
+	/* Smooth lighting factor. */
+	const float s = 0.2; /* [0.0-0.5] range */
+	float fac = clamp((n * (1.0 - s)) + s, 0.0, 1.0);
+	finalColor.rgb = mix(stateColor, boneColor, fac);
+	finalColor.a = 1.0;
+
+	gl_Position = ViewProjectionMatrix * (InstanceModelMatrix * vec4(pos, 1.0));
+}