设置three.js投影矩阵方向

Question

我读了下面为webgl写的代码，我想用three.js重写它。但我找不到任何办法，请帮助我。

pMatrix = mat4.create();
mat4.perspective(pMatrix,1.01,gl.drawingBufferWidth/gl.drawingBufferHeight, 10.0, 300000.0);
var eciMat = [1,  0,  0,  0,
           0,  0, -1,  0,
           0,  1,  0,  0,
           0,  0,  0,  1
           ];
mat4.mul(pMatrix, pMatrix, eciMat );

Answer 1

在Three.js中，Matrix类非常复杂，请查看文档：{​​{3}}

以下是我将如何在Three.js中编写

// Arguments are fov, aspect, near, far
var perspectiveMatrix = new THREE.Matrix4().makePerspective(30, 1, 0.01, 20);

var eciMatrix = new THREE.Matrix4();
eciMatrix.set(1,  0,  0,  0,
              0,  0, -1,  0,
              0,  1,  0,  0,
              0,  0,  0,  1);

var resultMatrix = new THREE.Matrix4();
resultMatrix.multiply(eciMatrix);
resultMatrix.multiply(perspectiveMatrix);
resultMatrix.multiply(perspectiveMatrix);

console.log(resultMatrix);