RenderGlobal.java 文件源码

private void fixTerrainFrustum(double x, double y, double z)
{
    this.debugFixedClippingHelper = new ClippingHelperImpl();
    ((ClippingHelperImpl)this.debugFixedClippingHelper).init();
    Matrix4f matrix4f = new Matrix4f(this.debugFixedClippingHelper.modelviewMatrix);
    matrix4f.transpose();
    Matrix4f matrix4f1 = new Matrix4f(this.debugFixedClippingHelper.projectionMatrix);
    matrix4f1.transpose();
    Matrix4f matrix4f2 = new Matrix4f();
    Matrix4f.mul(matrix4f1, matrix4f, matrix4f2);
    matrix4f2.invert();
    this.debugTerrainFrustumPosition.x = x;
    this.debugTerrainFrustumPosition.y = y;
    this.debugTerrainFrustumPosition.z = z;
    this.debugTerrainMatrix[0] = new Vector4f(-1.0F, -1.0F, -1.0F, 1.0F);
    this.debugTerrainMatrix[1] = new Vector4f(1.0F, -1.0F, -1.0F, 1.0F);
    this.debugTerrainMatrix[2] = new Vector4f(1.0F, 1.0F, -1.0F, 1.0F);
    this.debugTerrainMatrix[3] = new Vector4f(-1.0F, 1.0F, -1.0F, 1.0F);
    this.debugTerrainMatrix[4] = new Vector4f(-1.0F, -1.0F, 1.0F, 1.0F);
    this.debugTerrainMatrix[5] = new Vector4f(1.0F, -1.0F, 1.0F, 1.0F);
    this.debugTerrainMatrix[6] = new Vector4f(1.0F, 1.0F, 1.0F, 1.0F);
    this.debugTerrainMatrix[7] = new Vector4f(-1.0F, 1.0F, 1.0F, 1.0F);

    for (int i = 0; i < 8; ++i)
    {
        Matrix4f.transform(matrix4f2, this.debugTerrainMatrix[i], this.debugTerrainMatrix[i]);
        this.debugTerrainMatrix[i].x /= this.debugTerrainMatrix[i].w;
        this.debugTerrainMatrix[i].y /= this.debugTerrainMatrix[i].w;
        this.debugTerrainMatrix[i].z /= this.debugTerrainMatrix[i].w;
        this.debugTerrainMatrix[i].w = 1.0F;
    }
}