add mc_kuwahara_shader

mc_kuwahara_shader/shaders/gbuffers_terrain.vsh

@@ -0,0 +1,21 @@
+#version 150
+
+uniform mat4 modelViewMatrix;
+uniform mat4 projectionMatrix;
+uniform vec3 chunkOffset;
+
+in vec3 vaPosition;
+in vec4 vaColor;
+in vec2 vaUV0;
+in ivec2 vaUV2;
+
+out vec2 texCoord;
+out vec4 tintColor;
+out vec2 lightCoord;
+
+void main() {
+    gl_Position = projectionMatrix * modelViewMatrix * vec4(vaPosition + chunkOffset, 1.0);
+    texCoord = vaUV0;
+    tintColor = vaColor;
+    lightCoord = vaUV2 / 256.0;
+}