Eevee: Probes: Add data display for cubemaps.

1 files changed, 24 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee/shaders/lightprobe_cube_display_frag.glsl b/source/blender/draw/engines/eevee/shaders/lightprobe_cube_display_frag.glsl
new file mode 100644
index 00000000000..d651a866433
--- /dev/null
+++ b/source/blender/draw/engines/eevee/shaders/lightprobe_cube_display_frag.glsl
@@ -0,0 +1,24 @@
+
+uniform mat4 ProjectionMatrix;
+uniform mat4 ViewMatrixInverse;
+
+uniform sampler2DArray probeCubes;
+uniform float lodMax;
+
+flat in int pid;
+in vec3 worldNormal;
+in vec3 worldPosition;
+
+out vec4 FragColor;
+
+#define cameraForward   normalize(ViewMatrixInverse[2].xyz)
+#define cameraPos       ViewMatrixInverse[3].xyz
+
+void main()
+{
+	vec3 V = (ProjectionMatrix[3][3] == 0.0) /* if perspective */
+	            ? normalize(cameraPos - worldPosition)
+	            : cameraForward;
+	vec3 N = normalize(worldNormal);
+	FragColor = vec4(textureLod_octahedron(probeCubes, vec4(reflect(-V, N), pid), 0.0, lodMax).rgb, 1.0);
+}