Eevee: Add data display for planar reflection.

Maybe not very useful but it's here for feature parity with the other probes.
The fragment shader clipping is here because I'm lazy and don't want to creating a proper quad Batch.

1 files changed, 30 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee/shaders/lightprobe_planar_display_frag.glsl b/source/blender/draw/engines/eevee/shaders/lightprobe_planar_display_frag.glsl
new file mode 100644
index 00000000000..338dc3bf9c0
--- /dev/null
+++ b/source/blender/draw/engines/eevee/shaders/lightprobe_planar_display_frag.glsl
@@ -0,0 +1,30 @@
+
+uniform int probeIdx;
+uniform sampler2DArray probePlanars;
+
+layout(std140) uniform planar_block {
+	PlanarData planars_data[MAX_PLANAR];
+};
+
+in vec3 worldPosition;
+
+out vec4 FragColor;
+
+void main()
+{
+	PlanarData pd = planars_data[probeIdx];
+
+	/* Fancy fast clipping calculation */
+	vec2 dist_to_clip;
+	dist_to_clip.x = dot(pd.pl_clip_pos_x, worldPosition);
+	dist_to_clip.y = dot(pd.pl_clip_pos_y, worldPosition);
+	float fac = dot(step(pd.pl_clip_edges, dist_to_clip.xxyy), vec2(-1.0, 1.0).xyxy); /* compare and add all tests */
+
+	if (fac != 2.0) {
+		discard;
+	}
+
+	vec4 refco = pd.reflectionmat * vec4(worldPosition, 1.0);
+	refco.xy /= refco.w;
+	FragColor = vec4(textureLod(probePlanars, vec3(refco.xy, float(probeIdx)), 0.0).rgb, 1.0);
+}