1 files changed, 27 insertions, 0 deletions

diff --git a/res/shaders/glsl330/line.fs b/res/shaders/glsl330/line.fs
new file mode 100644
index 0000000..d7a8d48
--- /dev/null
+++ b/res/shaders/glsl330/line.fs
@@ -0,0 +1,27 @@
+#version 330 core
+
+uniform float time;
+uniform vec2 resolution;
+uniform vec2 mouse;
+
+out vec4 color;
+
+float
+plot (vec2 st)
+{
+  return smoothstep (0.01, 0.0, abs (st.y - st.x));
+}
+
+void
+main () {
+  vec2 st = gl_FragCoord.xy/resolution;
+
+  float y = st.x;
+
+  vec3 c = vec3 (y);
+
+  float pct = plot (st);
+  c = (1.0 - pct)*c + pct*vec3 (0.0, 1.0, 0.0);
+
+  color = vec4 (c, 1.0);
+}