From b8401062e1d3f5e6554ab7fd9b983ea63cfb05c5 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Wed, 10 Jan 2024 19:04:30 +0000
Subject: Initial commit with working light instancing

---
 gfx/gl/shaders/spotLight.fs |  6 ++++--
 gfx/gl/shaders/spotLight.gs |  6 +++---
 gfx/gl/shaders/spotLight.vs | 20 +++++++++++++-------
 3 files changed, 20 insertions(+), 12 deletions(-)

(limited to 'gfx/gl/shaders')

diff --git a/gfx/gl/shaders/spotLight.fs b/gfx/gl/shaders/spotLight.fs
index 937f922..6d5d332 100644
--- a/gfx/gl/shaders/spotLight.fs
+++ b/gfx/gl/shaders/spotLight.fs
@@ -6,8 +6,10 @@ out vec3 FragColor;
 layout(binding = 0) uniform isampler2D gPosition;
 layout(binding = 1) uniform sampler2D gNormal;
 uniform ivec4 viewPort;
-uniform vec3 colour;
-uniform float kq;
+// uniform vec3 colour;
+// uniform float kq;
+const vec3 colour = vec3(1);
+const float kq = 0.01;
 in vec4 geo_centre;
 in vec4 geo_direction;
 
diff --git a/gfx/gl/shaders/spotLight.gs b/gfx/gl/shaders/spotLight.gs
index b58c169..a2805fe 100644
--- a/gfx/gl/shaders/spotLight.gs
+++ b/gfx/gl/shaders/spotLight.gs
@@ -11,9 +11,9 @@ const vec3[] pyramid = vec3[]( // four-sided
 );
 uniform mat4 viewProjection;
 uniform ivec3 viewPoint;
-uniform float arc;
-
-in vec3 position[];
+// uniform float arc;
+const float arc = 1;
+in ivec3 position[];
 in vec3 direction[];
 in float size[];
 in float cosarc[];
diff --git a/gfx/gl/shaders/spotLight.vs b/gfx/gl/shaders/spotLight.vs
index ac1d1db..a2b755d 100644
--- a/gfx/gl/shaders/spotLight.vs
+++ b/gfx/gl/shaders/spotLight.vs
@@ -1,14 +1,20 @@
 #version 330 core
 
 layout(location = 0) in vec3 v_position;
+layout(location = 1) in vec3 v_direction;
+// layout(location = 2) in vec3 colour;
+// layout(location = 3) in float kq;
+// layout(location = 4) in float arc;
+layout(location = 5) in mat4 model;
+layout(location = 9) in ivec3 modelPos;
+
+const vec3 colour = vec3(1);
+const float kq = 0.01;
+const float arc = 1;
 
-uniform vec3 v_direction;
-uniform vec3 colour;
-uniform float kq;
-uniform float arc;
 uniform ivec3 viewPoint;
 
-out vec3 position;
+out ivec3 position;
 out vec3 direction;
 out float size;
 out float cosarc;
@@ -16,8 +22,8 @@ out float cosarc;
 void
 main()
 {
-	position = v_position;
-	direction = normalize(v_direction);
+	position = modelPos + ivec3(v_position * mat3(model));
+	direction = normalize(v_direction * mat3(model));
 	size = (8000 * sqrt(max(max(colour.r, colour.g), colour.b))) / sqrt(kq);
 	cosarc = cos(arc / 2);
 	gl_Position = vec4(position - viewPoint, 0);
-- 
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