3
votes
1answer
137 views

Best way to blend colors in tile lighting? (XNA)

I have made a color, decent, recursive, fast tile lighting system in my game. It does everything I need except one thing: different colors are not blended at all: Here is my color blend code: ...
3
votes
2answers
88 views

How can I read the color of a specific pixel in XNA?

I want a way to find out if, for example, the pixel at Vector2(2, 5) on the game window is color Color.Red, or some other color or set of coordinates. How can I do this?
1
vote
1answer
81 views

XNA 4: GetData from Texture2D and Set it into Texture3D with specific order

I am trying to convert my color grading 2d lookup texture into 3d LUT. When I simply use: ColorAtlas.GetData(data); ColorAtlas3D.SetData(data); I get this: I tried building my 2d atlass ...
3
votes
0answers
68 views

Problem building a color grading map

I am trying to build a default color grading map into a 1024x32 RenderTarget. Here is my shader code: VertexShaderOutput VertexShaderFunction(VertexShaderInput input) { VertexShaderOutput output; ...
0
votes
1answer
150 views

Creating a gradient for a texture - Why is the color becoming dark on one side?

Updated While debugging I looked at the lerp and it was calculating into a negative number at the start. So I added in checks for to low or high a value, and that seems to have fixed it. I'll answer ...
0
votes
1answer
119 views

How do you calculate a gradient value within multiple colors (gradient stops)

In WPF/Silverlight XAML you can have a brush with multiple gradient stops at different points along the color line. I was able to replicate this behavior with two colors, a single color lerp, from ...
1
vote
1answer
188 views

How do I find two points at an angle on opposite sides of a circle?

With reference to my previous question: I'm using micklh's answer, which works perfectly. However, it calculates the gradient based on two points, a starting point and an ending point. I want to ...
1
vote
1answer
268 views

Sprite collision with color?

Is this possible? To elaborate, I am making a PacMan offshoot. Essentially it is a "zoomed in" version of the game, but the board is randomly generated. I have 11 .png files each to be used as a ...
0
votes
1answer
67 views

XNA Float values don't work as parameter

With the Microsoft XNA Framework I can change the color of a tinted texture by changing it's integer values like so: Int x = 255; if(true) { x--; tint = new Color(x, 255, 255); } Draw(texture, ...
2
votes
2answers
132 views

Filling in a shape from vertices

What I'm trying to do is set a bunch of points to create a shape and then fill everything in within those points. It needs to be done in 3D becasue this is being used as a way to generate a texture ...
-1
votes
1answer
141 views

XNA changing color alpha

I know I can take a color and multiply it by a float to reduce its alpha like that: Color color = Color.Green * 0.15f; But how do I return the color's alpha to it's original value? I tried doing ...
2
votes
1answer
133 views

Get average tile color

In my 2D game I have TileSet class that loads the texture and creates Rectangle[] array which stores each tile coordinates. Pretty basic stuff. Now I'd like to also calculate and store the average ...
1
vote
2answers
738 views

How (update,set, apply) dynamically color on a model of a XNA project?

I encounter a problem for set a background color on my model instantiated. I can change the texture but not change color. Is there a parameter for change the color ? Or change the opacity ? I am ...
3
votes
1answer
780 views

Apply Vertex Colors to XNA Spritebatch sprites

I know that you can use custom vertex and pixel shaders using SpriteBatch but I can't figure out how to apply colors to individual vertex points on a sprite generated by spritebatch. All I can do is ...
4
votes
2answers
515 views

Programatically replace color gradient on sprite

Say I have the following image: I want to tint the yellow parts on this sprites shoulder/arms by a random color. In other questions on this site, they suggest using a chroma key and replacing the ...
2
votes
1answer
262 views

Shader and Custom Vertex Format Errors

I am creating an editor of sorts that allow you to create 3D voxel models. I just got started and have ran into a few errors. Here is what it is producing: I think the problem has to do with the ...
2
votes
1answer
265 views

How can I get the texture color data from GLEED2D's level file?

I've hit a little snag in my game. It's a 2D platform game and I need to check for collisions against the level. I'm using GLEED2D to create the map. I'd like to do per-pixel collision checking, but ...