/**
* 从4*4矩阵设置数值
*
* @param matrix
*/
public void setValue(Matrix4 matrix)
{
if (matrix == null)
{
return;
}
for (int i = 0; i < data.Length; i++)
{
this.data[i] = matrix.data[i];
}
}
/**
* 4x4矩阵和本向量的乘积(结果会化成w=1)
*
* @param m
* 矩阵
*/
public void multiplyBy(Matrix4 m)
{
float wT = 1.0f / (m.data[Matrix4.M30] * x + m.data[Matrix4.M31] * y + m.data[Matrix4.M32] * z + m.data[Matrix4.M33]);
x = (m.data[Matrix4.M00] * x + m.data[Matrix4.M01] * y + m.data[Matrix4.M02] * z + m.data[Matrix4.M03]) * wT;
y = (m.data[Matrix4.M10] * x + m.data[Matrix4.M11] * y + m.data[Matrix4.M12] * z + m.data[Matrix4.M13]) * wT;
z = (m.data[Matrix4.M20] * x + m.data[Matrix4.M21] * y + m.data[Matrix4.M22] * z + m.data[Matrix4.M23]) * wT;
}
public static void drawTextureImage(TextureImage textrueImage, RectangleF srcRect, RectangleF destRect, Matrix4 matrix,float alpha)
{
alpha = MathUtil.limitNumber(alpha, 0, 1);
//GLGraphics.setColor((uint)(0xFFFFFF | (((int)(alpha*255))<<24)));
GL.Color4(1.0f, 1.0f, 1.0f, alpha);
GL.PushMatrix();
GL.Enable(EnableCap.Texture2D);
GL.Enable(EnableCap.LineSmooth);
//目标尺寸
float _dw = destRect.Width;
float _dh = destRect.Height;
//贴图坐标
float txW = textrueImage.TextureWidth;
float txH = textrueImage.TextureHight;
float ltX = srcRect.X / txW;
float ltY = srcRect.Y / txH;
float rbX = (srcRect.X + srcRect.Width) / txW;
float rbY = (srcRect.Y + srcRect.Height) / txH;
GL.BindTexture(TextureTarget.Texture2D, textrueImage._name);
matrixDraw.identity();
matrixDraw.preTranslate(destRect.X, destRect.Y);
if (matrix != null)
{
matrix.multiply(matrixDraw, matrixDraw);
}
float[] data = matrixDraw.getValue();
GL.MultMatrix(data);
GL.Begin(BeginMode.Quads);
GL.TexCoord2(ltX, ltY);
GL.Vertex3(0, 0, 0);
GL.TexCoord2(rbX, ltY);
GL.Vertex3(_dw, 0, 0);
GL.TexCoord2(rbX, rbY);
GL.Vertex3(_dw, _dh, 0);
GL.TexCoord2(ltX, rbY);
GL.Vertex3(0, _dh, 0);
GL.End();
GL.Disable(EnableCap.Texture2D);
GL.PopMatrix();
}
public Matrix4(Matrix4 t)
{
setData(t.data);
}
/**
* 逆反矩阵，将结果赋值给指定结果
*/
public bool inverse(Matrix4 res)
{
return inverse(this.getValue(), res.getValue());
}
/**
* 4x4矩阵转置（矩阵的行和列互换。）
*/
public Matrix4 transpose()
{
Matrix4 m = new Matrix4();
for (int i = 0; i < 16; i++)
{
m.data[i] = data[TR[i]];
}
return m;
}
/**
* 两个4×4矩阵的乘积（当前矩阵左乘M，并将结果赋值给传入的矩阵。）
*
* @param m
* @param res
*/
public void multiply(Matrix4 m, Matrix4 res)
{
multiply(this.getValue(), m.getValue(), res.getValue());
}
/**
* 两个4×4矩阵的乘积，并将结果赋给当前矩阵（当前矩阵左乘M。）
*
* @param m
*/
public void multiply(Matrix4 m)
{
multiply(this.getValue(), m.getValue(), this.getValue());
}