Implement particle trails using overlaying textures

1 files changed, 22 insertions, 3 deletions

diff --git a/src/shader/display_fragment.glsl b/src/shader/display_fragment.glsl
index 8b98ce1..03986a0 100644
--- a/src/shader/display_fragment.glsl
+++ b/src/shader/display_fragment.glsl
@@ -1,11 +1,30 @@
 static const std::string DISPLAY_FRAGMENT_SHADER_CODE = R"(
-#version 330 core
+#version 460
 
 out vec4 FragColor;
 in vec2 TexCoords;
-uniform sampler2D screen_texture;
+
+uniform sampler2D screen_texture_0;
+uniform sampler2D screen_texture_1;
+uniform sampler2D screen_texture_2;
+uniform sampler2D screen_texture_3;
+uniform sampler2D screen_texture_4;
+uniform sampler2D screen_texture_5;
+uniform sampler2D screen_texture_6;
+uniform sampler2D screen_texture_7;
+uniform sampler2D screen_texture_8;
+uniform sampler2D screen_texture_9;
 
 void main() {
-	FragColor = texture(screen_texture, TexCoords);
+	FragColor =       texture(screen_texture_0, TexCoords)
+	          + 0.9 * texture(screen_texture_1, TexCoords)
+	          + 0.8 * texture(screen_texture_2, TexCoords)
+	          + 0.7 * texture(screen_texture_3, TexCoords)
+	          + 0.6 * texture(screen_texture_4, TexCoords)
+	          + 0.5 * texture(screen_texture_5, TexCoords)
+	          + 0.4 * texture(screen_texture_6, TexCoords)
+	          + 0.3 * texture(screen_texture_7, TexCoords)
+	          + 0.2 * texture(screen_texture_8, TexCoords)
+	          + 0.1 * texture(screen_texture_9, TexCoords);
 }
 )";