highlight colliding drones

1 files changed, 7 insertions, 1 deletions

diff --git a/shaders/main.frag b/shaders/main.frag
index 7120521..f69789c 100644
--- a/shaders/main.frag
+++ b/shaders/main.frag
@@ -3,6 +3,7 @@ varying vec2 uv;
 varying vec3 frag_pos;
 
 uniform sampler2D tex;
+uniform bool highlight;
 
 void main() {
 	vec3 light_col = vec3(1, .964, .783);
@@ -12,5 +13,10 @@ void main() {
 	float diff = max(dot(normalize(norm), light_dir), 0.0);
 	vec3 diffuse = diff * light_col;
 
-	gl_FragColor = texture2D(tex, uv) * vec4(ambient + diffuse, 1);
+	vec4 col = texture2D(tex, uv) * vec4(ambient + diffuse, 1);
+
+	if (highlight) {
+		col = mix(col, vec4(1, 0, 0, 1), .5);
+	}
+	gl_FragColor = col;
 }