好吧,这里要疯了。我正在做一些 WebGL,我正在尝试制作一个等距立方体。我不想使用 Three.js。我想先了解我的代码出了什么问题。我一直在研究,我能找到的唯一教程似乎是针对 OpenGL
无论如何-这是我的drawScene函数:
function drawScene() {
this.gl.clear(this.gl.COLOR_BUFFER_BIT | this.gl.DEPTH_BUFFER_BIT);
mat4.perspective(45, this.gl.viewportWidth / this.gl.viewportHeight, 0.1, 100.0, pMatrix);
mvMatrix = mat4.lookAt([0,0,40], [0, 0, 0], [0, 1, 0]);
_globalNext = this._first;
while(_globalNext) {
_globalNext.render();
}
}
并且渲染功能是
function render() {
mvPushMatrix();
//transform. order matters.
mat4.translate(mvMatrix, [this._x, this._y, this._z]);
mat4.rotate(mvMatrix, 0.01745*this._rot, [this._axisX, this._axisY, this._axisZ]);
mat4.scale(mvMatrix, [this._scaleX,this._scaleY,this._scaleZ]);
//bind the buffers.
this.gl.bindBuffer(this.gl.ARRAY_BUFFER, this._positionBuff);
this.gl.vertexAttribPointer(this._shader.vertexPositionAttribute, this._positionBuff.itemSize, this.gl.FLOAT, false, 0, 0);
this.gl.bindBuffer(this.gl.ARRAY_BUFFER, this._colorBuff);
this.gl.vertexAttribPointer(this._shader.vertexColorAttribute, this._colorBuff.itemSize, this.gl.FLOAT, false, 0, 0);
this.gl.bindBuffer(this.gl.ELEMENT_ARRAY_BUFFER, this._indexBuff);
this.setMatrixUniforms(this.gl);
this.gl.drawElements(this.gl.TRIANGLES, this._indexBuff.numItems, this.gl.UNSIGNED_SHORT, 0);
if(this._usePopper == false) {
mvPopMatrix();
}
_globalNext = this._nextSib;
}
相当行人。我用它来画立方体。无论如何,在 OpenGL 示例中,它们似乎取消了透视功能,但在这里如果我忽略它,我的场景是空白的。我知道lookAt 函数工作正常,我必须对透视矩阵做一些事情。一点帮助将不胜感激。谢谢!