I came across the following code snippet intended for webgl, and I am looking to rewrite it using three.js. However, I haven't been able to figure out how to do so. Can someone please assist me with this?
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);
When it comes to Matrix classes in Three.js, they offer a high level of sophistication. For detailed information, refer to the documentation available at:
Below is an example of how you can implement Matrix classes in Three.js:
// Define perspective matrix with parameters (fov, aspect, near, far)
var perspectiveMatrix = new THREE.Matrix4().makePerspective(30, 1, 0.01, 20);
// Create ECI matrix
var eciMatrix = new THREE.Matrix4();
eciMatrix.set(
1, 0, 0, 0,
0, 0, -1, 0,
0, 1, 0, 0,
0, 0, 0, 1
);
// Multiply matrices to get result
var resultMatrix = new THREE.Matrix4();
resultMatrix.multiply(eciMatrix);
resultMatrix.multiply(perspectiveMatrix);
resultMatrix.multiply(perspectiveMatrix);
console.log(resultMatrix);
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