Move shader sources to files.

res/shaders/main.frag.glsl

@@ -0,0 +1,11 @@
+#version 440
+
+layout(location=0) uniform vec4 ucol;
+layout(location=0) out vec4 col;
+
+void main() {
+    float d = 1.0 - gl_FragCoord.z;
+    d = (d - 0.5) / 0.7 + 0.5;
+    col = ucol;
+    col.xyz *= d;
+}

res/shaders/main.vert.glsl

@@ -0,0 +1,18 @@
+#version 440
+
+layout(location=1) uniform float time;
+layout(location=2) uniform mat4 proj;
+layout(location=0) in vec3 pos;
+
+void main() {
+    float c2 = cos(time * 0.2);
+    float s2 = sin(time * 0.2);
+    float c3 = cos(time * 0.3);
+    float s3 = sin(time * 0.3);
+
+    mat4 r1 = mat4(c2, -s2, 0.0, 0.0, s2, c2, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0);
+
+    mat4 r2 = mat4(c3, 0.0, -s3, 0.0, 0.0, 1.0, 0.0, 0.0, s3, 0.0, c3, 0.0, 0.0, 0.0, 0.0, 1.0);
+
+    gl_Position = proj * r2 * r1 * vec4(pos, 1.0);
+}