[RELEASE] u22-v03

This version is submitted to U22 breau.

core/loshader/ground.vshader

@@ -0,0 +1,20 @@
+layout (location = 0) in float i_ground_id;
+layout (location = 1) in vec2  i_pos;
+layout (location = 2) in vec2  i_size;
+
+out float v_ground_id;
+out vec2  v_size;
+out vec2  v_uv;
+
+const vec2[] square_ = vec2[](
+    vec2(-1.,  1.), vec2(-1., -1.), vec2( 1., -1.),
+    vec2(-1.,  1.), vec2( 1., -1.), vec2( 1.,  1.)
+);
+
+void main(void) {
+  v_ground_id = i_ground_id;
+  v_size      = i_size;
+  v_uv        = square_[gl_VertexID];
+  gl_Position = uni.proj * uni.cam * vec4(v_uv*i_size+i_pos, 0., 1.);
+}
+