Java旋转矩阵& OBB

时间:2014-12-22 18:40:56

标签: java opengl matrix 3d rotation

您好我正在尝试使用lwjgl将OBB构建到我的3d java游戏中。目前我只是尝试使用matrix4f旋转OBB并通过渲染点来测试它。因此,当我渲染它时,xyx = 0,0,0且x轴上的角度= 1,它将旋转正常。但是当我向上移动y轴时,如果y = 5,旋转将不再围绕中心旋转。

我尝试用翻译解决这个问题,但它不起作用。我也想知道是否有办法访问opengl的push / pop和旋转方法来为我的点获取这些变量,因为opengl rotate完美地完成了它。

这是我的OBB课程:

public OBB(float x,float y,float z,float angleX,float angleY,float angleZ,float sizeX,float sizeY,float sizeZ){         this.x = X;         this.y = Y;         this.z = Z;

    this.angleX=angleX;
    this.angleY=angleY;
    this.angleZ=angleZ;

    this.sizeX=sizeX;
    this.sizeY=sizeY;
    this.sizeZ=sizeZ;

    posUBR = new Vector3f(x-sizeX,y+sizeY,z+sizeZ);//UpperBackRight
    posUBL = new Vector3f(x-sizeX,y+sizeY,z-sizeZ);//UpperBackLeft
    posUFL = new Vector3f(x+sizeX,y+sizeY,z-sizeZ);//UpperForLeft
    posUFR = new Vector3f(x+sizeX,y+sizeY,z+sizeZ);//UpperForRight

    posLBR = new Vector3f(x-sizeX,y-sizeY,z+sizeZ);//LowerBackRight
    posLBL = new Vector3f(x-sizeX,y-sizeY,z-sizeZ);//LowerBackLeft
    posLFL = new Vector3f(x+sizeX,y-sizeY,z-sizeZ);//LowerForLeft
    posLFR = new Vector3f(x+sizeX,y-sizeY,z+sizeZ);//LowerForRight

    posUBR=rotMat(posUBR);
    posUBL=rotMat(posUBL);
    posUFL=rotMat(posUFL);
    posUFR=rotMat(posUFR);

    posLBR=rotMat(posLBR);
    posLBL=rotMat(posLBL);
    posLFL=rotMat(posLFL);
    posLFR=rotMat(posLFR);

}

这是我的轮换方法:

public Vector3f rotMatrix(Vector3f point){            Matrix4f rotationMatrix = new Matrix4f();

       rotationMatrix.m00 = point.x;
       rotationMatrix.m10 = point.y;
       rotationMatrix.m20 = point.z;       

       rotationMatrix.translate(new Vector3f(-x,-y,-z));

       rotationMatrix.rotate(angleX,new Vector3f(1,0,0));
       rotationMatrix.rotate(angleY,new Vector3f(0,1,0));
       rotationMatrix.rotate(angleZ,new Vector3f(0,0,1));

       rotationMatrix.translate(new Vector3f(x,y,-z));


       return new Vector3f(rotationMatrix.m00, rotationMatrix.m10, rotationMatrix.m20);
}

public void rotate(){
    posUBR=rotMatrix(posUBR);
    posUBL=rotMatrix(posUBL);
    posUFL=rotMatrix(posUFL);
    posUFR=rotMatrix(posUFR);

    posLBR=rotMatrix(posLBR);
    posLBL=rotMatrix(posLBL);
    posLFL=rotMatrix(posLFL);
    posLFR=rotMatrix(posLFR);
}

我的渲染功能有点长,但它基本上渲染了一个立方体。

1 个答案:

答案 0 :(得分:0)

抱歉,我需要做的就是设置为原始功能:

public void setToOrigin(){
    posUBR = new Vector3f(0-sizeX,0+sizeY,0+sizeZ);
    posUBL = new Vector3f(0-sizeX,0+sizeY,0-sizeZ);
    posUFL = new Vector3f(0+sizeX,0+sizeY,0-sizeZ);
    posUFR = new Vector3f(0+sizeX,0+sizeY,0+sizeZ);

    posLBR = new Vector3f(0-sizeX,0-sizeY,0+sizeZ);
    posLBL = new Vector3f(0-sizeX,0-sizeY,0-sizeZ);
    posLFL = new Vector3f(0+sizeX,0-sizeY,0-sizeZ);
    posLFR = new Vector3f(0+sizeX,0-sizeY,0+sizeZ);
}