internal bool TexturesCollided(XNACS1Primitive primitive1, XNACS1Primitive primitive2, out Vector2 collidePos)
{
collidePos = Vector2.Zero;
Texture2D tex1 = m_TexTable.FindTexture(primitive1.Texture);
Texture2D tex2 = m_TexTable.FindTexture(primitive2.Texture);
if ((null == tex1) || (null == tex2))
{
return(false);
}
Color[] tex1Color = m_TexTable.FindTextureColor(primitive1.Texture);
Color[] tex2Color = m_TexTable.FindTextureColor(primitive2.Texture);
bool pixelTouch = false;
float r1InRadian = MathHelper.ToRadians(primitive1.RotateAngle);
float r2InRadian = MathHelper.ToRadians(primitive2.RotateAngle);
Vector2 p1XDir = RotateVectorByAngle(Vector2.UnitX, r1InRadian);
Vector2 p1YDir = RotateVectorByAngle(Vector2.UnitY, r1InRadian);
Vector2 p2XDir = RotateVectorByAngle(Vector2.UnitX, r2InRadian);
Vector2 p2YDir = RotateVectorByAngle(Vector2.UnitY, r2InRadian);
int tex1Width = tex1.Width;
int tex1Height = tex1.Height;
int tex1XOffset = 0;
int tex1YOffset = 0;
int tex2Width = tex2.Width;
int tex2Height = tex2.Height;
int tex2XOffset = 0;
int tex2YOffset = 0;
if (primitive1.UseSpriteSheet)
{
tex1Width = primitive1.m_SpriteSourceRect.Width;
tex1Height = primitive1.m_SpriteSourceRect.Height;
tex1XOffset = primitive1.m_SpriteSourceRect.X;
tex1YOffset = primitive1.m_SpriteSourceRect.Y;
}
if (primitive2.UseSpriteSheet)
{
tex2Width = primitive2.m_SpriteSourceRect.Width;
tex2Height = primitive2.m_SpriteSourceRect.Height;
tex2XOffset = primitive2.m_SpriteSourceRect.X;
tex2YOffset = primitive2.m_SpriteSourceRect.Y;
}
int i = 0;
while ((!pixelTouch) && (i < tex1Width))
{
int j = 0;
while ((!pixelTouch) && (j < tex1Height))
{
collidePos = primitive1.TextureToWorldPos(i, j, tex1Width, tex1Height, p1XDir, p1YDir);
Color color1 = tex1Color[tex1XOffset + i + ((j + tex1YOffset) * tex1.Width)];
if (color1.A > 0)
{
int p2I, p2J;
primitive2.CameraPosToTexIndex(collidePos, tex2Width, tex2Height, p2XDir, p2YDir, out p2I, out p2J);
if ((p2I >= 0) && (p2I < tex2Width) &&
(p2J >= 0) && (p2J < tex2Height))
{
pixelTouch = (tex2Color[tex2XOffset + p2I + ((p2J + tex2YOffset) * tex2.Width)].A > 0);
}
}
j++;
}
i++;
}
return(pixelTouch);
}
