Renderer|FX|LensFlares: Aspect correction in view space

Calculate the appropriate view unit vector. This is dependent on the GL viewport.
skyjake · Nov 18, 2013 · 8d7b84c · 8d7b84c
1 parent 314e57a
commit 8d7b84c
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Showing 2 changed files with 4 additions and 5 deletions.
diff --git a/doomsday/client/data/shaders/lensflares.vsh b/doomsday/client/data/shaders/lensflares.vsh
@@ -7,8 +7,6 @@ varying highp vec2 vUV;
 
 void main(void) {
     gl_Position = uMvpMatrix * aVertex;
-    gl_Position.xyz /= gl_Position.w;
-    gl_Position.w = 1.0;
-    gl_Position.xy += aUV2 * uViewUnit;
+    gl_Position.xy += aUV2 * uViewUnit * vec2(gl_Position.w);
     vUV = aUV;
 }
diff --git a/doomsday/client/src/render/fx/lensflares.cpp b/doomsday/client/src/render/fx/lensflares.cpp
@@ -246,9 +246,10 @@ void fx::LensFlares::beginFrame()
 
 void LensFlares::draw()
 {
-    //Rectanglef const rect = viewRect();
+    Rectanglef const rect = viewRect();
+    float const    aspect = rect.height() / rect.width();
 
-    d->uViewUnit = Vector2f(1, 1);
+    d->uViewUnit  = Vector2f(aspect, 1.f);
     d->uMvpMatrix = GL_GetProjectionMatrix() * Rend_GetModelViewMatrix(console());
 
     GLState::push()