make the grid fade out, looks nicer

Sage-of-Mirrors · Nov 21, 2024 · b236122 · b236122
1 parent a43d5ff
commit b236122
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/include/UGridShader.h b/include/UGridShader.h
@@ -8,7 +8,8 @@ const char* UGridVertexShader =
 	"layout(location = 1) in vec3 aTex;\n\n"
 
 	"// Output to Fragment Shader\n"
-	"out vec2 oTex;\n\n"
+	"out vec2 oTex;\n"
+	"out vec2 oTexCenter;\n\n"
 
 	"uniform mat4 uModelMtx;\n"
 	"uniform mat4 uViewMtx;\n"
@@ -18,6 +19,7 @@ const char* UGridVertexShader =
 	"void main()\n"
 	"{\n"
 	"\toTex = aTex.xy * uTexScale;\n"
+	"\toTexCenter = vec2(uTexScale / 2, uTexScale / 2);\n"
 	"\tmat4 MVP = uProjMtx * uViewMtx * uModelMtx;\n\n"
 
 	"\tgl_Position = MVP * vec4(aPos, 1);\n"
@@ -27,7 +29,8 @@ const char* UGridFragmentShader =
 	"#version 460\n\n"
 
 	"// Input from Vertex Shader\n"
-	"in vec2 oTex;\n\n"
+	"in vec2 oTex;\n"
+	"in vec2 oTexCenter;\n\n"
 
 	"// Final pixel color\n"
 	"out vec4 PixelColor;\n\n"
@@ -38,6 +41,7 @@ const char* UGridFragmentShader =
 	"void main()\n"
 	"{\n"
 	"\tPixelColor = texture(uTexture, oTex);\n"
+	"\tPixelColor.a -= distance(oTex, oTexCenter) / 32;\n"
 	"\tif (PixelColor.a < 0.01f)\n"
 	"\t{\n"
 	"\t\tdiscard;\n"