add sources

1 files changed, 17 insertions, 0 deletions

diff --git a/res/spotlight.frag b/res/spotlight.frag
new file mode 100644
index 0000000..91e4d0b
--- /dev/null
+++ b/res/spotlight.frag
@@ -0,0 +1,17 @@
+#version 330 core
+
+in vec2 fragTexCoord;           // from raylib
+
+uniform sampler2D texture0;     // from raylib
+uniform vec2      target;
+uniform float     dimness;
+uniform float     radius;
+
+out vec4 color;
+
+void main()
+{
+  color = mix (texture (texture0, fragTexCoord), vec4(0),
+               length (target - gl_FragCoord.xy) < radius
+               ? 0.0 : dimness);
+}