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add texture coordinate scaling helper methods

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Gered 2013-08-25 16:01:55 -04:00
parent 96246f47c1
commit 2ccdb391bc
1 changed files with 31 additions and 0 deletions
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31
Blarg.GameFramework/Graphics/Helpers/GraphicsHelpers.cs
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@ -1,4 +1,5 @@
using System;
using Blarg.GameFramework.Graphics.Atlas;
namespace Blarg.GameFramework.Graphics.Helpers
{
@ -40,6 +41,36 @@ namespace Blarg.GameFramework.Graphics.Helpers
debugRenderer.Render(backwardLine, Color.Yellow);
spriteBatch.Render(font, backwardPos, Color.Yellow, "BACKWARD (+Z)");
}
public static Vector2 ScaleTexCoord(Vector2 texCoord, TextureRegion tile) {
Vector2 result;
result.X = ScaleTexCoordU(texCoord.X, tile);
result.Y = ScaleTexCoordV(texCoord.Y, tile);
return result;
}
public static Vector2 ScaleTexCoord(Vector2 texCoord, float srcMin, float srcMax, TextureRegion tile) {
Vector2 result;
result.X = ScaleTexCoordU(texCoord.X, srcMin, srcMax, tile);
result.Y = ScaleTexCoordV(texCoord.Y, srcMin, srcMax, tile);
return result;
}
public static float ScaleTexCoordU(float u, TextureRegion tile) {
return MathHelpers.ScaleRange(u, 0.0f, 1.0f, tile.TexCoords.Left, tile.TexCoords.Right);
}
public static float ScaleTexCoordU(float u, float srcMinU, float srcMaxU, TextureRegion tile) {
return MathHelpers.ScaleRange(u, srcMinU, srcMaxU, tile.TexCoords.Left, tile.TexCoords.Right);
}
public static float ScaleTexCoordV(float v, TextureRegion tile) {
return MathHelpers.ScaleRange(v, 0.0f, 1.0f, tile.TexCoords.Top, tile.TexCoords.Bottom);
}
public static float ScaleTexCoordV(float v, float srcMinV, float srcMaxV, TextureRegion tile) {
return MathHelpers.ScaleRange(v, srcMinV, srcMaxV, tile.TexCoords.Top, tile.TexCoords.Bottom);
}
}
}