1 files changed, 79 insertions, 0 deletions
diff --git a/servers/visual/rasterizer_rd/shaders/sky.glsl b/servers/visual/rasterizer_rd/shaders/sky.glsl
new file mode 100644
index 0000000000..28fd2883c3
--- /dev/null
+++ b/servers/visual/rasterizer_rd/shaders/sky.glsl
@@ -0,0 +1,79 @@
+/* clang-format off */
+[vertex]
+
+#version 450
+
+VERSION_DEFINES
+
+layout(location = 0) out vec2 uv_interp;
+/* clang-format on */
+
+layout(push_constant, binding = 1, std430) uniform Params {
+	mat3 orientation;
+	vec4 proj;
+	float multiplier;
+	float alpha;
+	float depth;
+	float pad;
+}
+params;
+
+void main() {
+
+	vec2 base_arr[4] = vec2[](vec2(-1.0, -1.0), vec2(-1.0, 1.0), vec2(1.0, 1.0), vec2(1.0, -1.0));
+	uv_interp = base_arr[gl_VertexIndex];
+	gl_Position = vec4(uv_interp, params.depth, 1.0);
+}
+
+/* clang-format off */
+[fragment]
+
+#version 450
+
+VERSION_DEFINES
+
+#define M_PI 3.14159265359
+
+layout(location = 0) in vec2 uv_interp;
+/* clang-format on */
+
+layout(set = 0, binding = 0) uniform sampler2D source_panorama;
+
+layout(push_constant, binding = 1, std430) uniform Params {
+	mat3 orientation;
+	vec4 proj;
+	float multiplier;
+	float alpha;
+	float depth;
+	float pad;
+}
+params;
+
+vec4 texturePanorama(sampler2D pano, vec3 normal) {
+
+	vec2 st = vec2(
+			atan(normal.x, normal.z),
+			acos(normal.y));
+
+	if (st.x < 0.0)
+		st.x += M_PI * 2.0;
+
+	st /= vec2(M_PI * 2.0, M_PI);
+
+	return texture(pano, st);
+}
+
+layout(location = 0) out vec4 frag_color;
+
+void main() {
+
+	vec3 cube_normal;
+	cube_normal.z = -1000000.0;
+	cube_normal.x = (cube_normal.z * (-uv_interp.x - params.proj.x)) / params.proj.y;
+	cube_normal.y = -(cube_normal.z * (-uv_interp.y - params.proj.z)) / params.proj.w;
+	cube_normal = mat3(params.orientation) * cube_normal;
+	cube_normal.z = -cube_normal.z;
+
+	frag_color.rgb = texturePanorama(source_panorama, normalize(cube_normal.xyz)).rgb;
+	frag_color.a = params.alpha;
+}