Add floor

floor-vert.glsl

@@ -0,0 +1,21 @@
+#version 450
+
+layout(location = 0) out vec3 frag_normal;
+
+layout(push_constant) uniform vp_t {
+	mat4 view;
+	mat4 proj;
+} vp;
+
+vec2 vertices[4] = vec2[](
+	vec2(-1, -1),
+	vec2(-1, 1),
+	vec2(1, 1),
+	vec2(1, -1)
+);
+
+void main() {
+	const vec2 pos = 3 * vertices[gl_VertexIndex];
+	gl_Position = vp.proj * vp.view * vec4(pos.x, 0, pos.y, 1); 
+	frag_normal = vec3(0, 1, 0);
+}