I am having a strange problem, and forgive me if this has been solved as I've looked through quite a bit of the forums and found one other issue similar to this but it wasn't really resolved other than "Write a pixel shader" (which I don't really know how to do).
I am currently rending a 2d grid of 64x64 tiles using a vertexarray and quads.
I am using the following function to add quads with per vertex alpha blending to my vertex array:
// ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// public void AddGroundTileWithAlphaAndColorAndTransparency
(float X,
float Y,
int TileNumber,
int Scale, Color V0, Color V1, Color V2, Color V3
) { FloatRect MyGraphic
= Tool_GetRectForTile
(TileNumber,
64, Texture
); Vertex MyVert1
= new Vertex
(new Vector2f
(X, Y
), V0,
new Vector2f
(MyGraphic
.Left, MyGraphic
.Top)); Vertex MyVert2
= new Vertex
(new Vector2f
(X
+ Scale, Y
), V1,
new Vector2f
(MyGraphic
.Left + MyGraphic
.Width, MyGraphic
.Top)); Vertex MyVert3
= new Vertex
(new Vector2f
(X
+ Scale, Y
+ Scale
),V2,
new Vector2f
(MyGraphic
.Left + MyGraphic
.Width, MyGraphic
.Top + MyGraphic
.Height)); Vertex MyVert4
= new Vertex
(new Vector2f
(X, Y
+ Scale
), V3,
new Vector2f
(MyGraphic
.Left, MyGraphic
.Top + MyGraphic
.Height)); VT_VertexData
.Append(MyVert1
); VT_VertexData
.Append(MyVert2
); VT_VertexData
.Append(MyVert3
); VT_VertexData
.Append(MyVert4
); } Using this method I am getting some strange blending results which I can only assume are coming from OpenGL translating my quad into 2 triangles.
Here is an example of 2 different "fringes" being generated on the fly, #1 (V0, V1, V3) with an alpha of zero this works.
But #2 (V0,V1,V2) with an alpha of zero does the blend improperly.
Here is a close of how I think the triangles are being rendered properly.
Here is an improper alpha blend:
Is there anything I can do to make the alpha blend occour across the whole quad and not just the individual triangles?
A
