shader

1 files changed, 15 insertions, 0 deletions

diff --git a/assets/platform_f.glsl b/assets/platform_f.glsl
new file mode 100644
index 0000000..1969a46
--- /dev/null
+++ b/assets/platform_f.glsl
@@ -0,0 +1,15 @@
+varying vec4 color;
+varying vec2 p1, p2;
+varying vec2 pos;
+uniform float thickness;
+
+void main() {
+	// thanks to https://www.youtube.com/watch?v=PMltMdi1Wzg
+	float h = clamp(dot(pos-p1, p2-p1) / dot(p2-p1, p2-p1), 0.0, 1.0);
+	float d = length(pos - p1 - (p2-p1) * h);
+	
+	float v = max(thickness - d, 0.0);
+	v /= thickness;
+
+	gl_FragColor = color * v;
+}