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我有点惊讶。我一直在调试我的代码几个小时,GLM似乎放弃了我。我有以下2个实例挣扎:GLM乘法指令
....
cout << "multiplying A:" << endl;
displayMatrix(node->wMatrix);
cout << "and B:" << endl;
displayMatrix((node->children)[i]->wMatrix);
//switch order!
mat4 temp = (node->children)[i]->wMatrix * node->wMatrix;
cout << "Get result as:" << endl;
displayMatrix(temp);
...
的displayMatrix方法如下:
void displayMatrix(mat4 &m)
{
cout << m[0][0] << " " << m[0][1] << " " << m[0][2] << " " << m[0][3] << endl;
cout << m[1][0] << " " << m[1][1] << " " << m[1][2] << " " << m[1][3] << endl;
cout << m[2][0] << " " << m[2][1] << " " << m[2][2] << " " << m[2][3] << endl;
cout << m[3][0] << " " << m[3][1] << " " << m[3][2] << " " << m[3][3] << endl;
}
这里的输出我得到:
multiplying A:
1 0 0 0
0 1 0 0.5
0 0 1 0
0 0 0 1
and B:
0.540302 -0.841471 0 0
0.841471 0.540302 0 -0.5
0 0 1 0
0 0 0 1
Get result as:
0.540302 -0.841471 0 0
0.841471 0.540302 0 0
0 0 1 0
0 0 0 1
注意,在上面的代码,矩阵乘法顺序与你在纸上写的内容相反。换句话说,代码表示B * A.我被这个抛弃了。
第二个实例:
cout << "temp:" << endl;
cout << temp.x << " " << temp.y << " " << temp.z << " " << temp.w << endl;
cout << "binding matrix inverse: " << endl;
displayMatrix(bindingInvs.at(jIndex));
temp = bindingInvs.at(jIndex) * temp;
cout << "now temp:" << endl;
cout << temp.x << " " << temp.y << " " << temp.z << " " << temp.w << endl;
cout << "joint world matrix: " << endl;
displayMatrix(joints.at(jIndex)->wMatrix);
temp = (joints.at(jIndex)->wMatrix) * temp;
cout << "now temp:" << endl;
cout << temp.x << " " << temp.y << " " << temp.z << " " << temp.w << endl;
cout << "weight: " << jWeight << endl;
temp = jWeight * temp;
cout << "now temp:" << endl;
cout << temp.x << " " << temp.y << " " << temp.z << " " << temp.w << endl;
,我现在得到的输出是:
temp:
0.087 0 -0.05 1
binding matrix inverse:
1 -0 0 -0
-0 1 -0 0
0 -0 1 -0
-0 0 -0 1
now temp:
0.087 0 -0.05 1
joint world matrix:
1 0 0 0
0 1 0 0.5
0 0 1 0
0 0 0 1
now temp:
0.087 0 -0.05 1
weight: 1
now temp:
0.087 0 -0.05 1
温度永远不会得到改变出于某种原因。我不知道该怎么做,或者为什么会发生这种情况。我的程序编译并运行(我从上面的输出粘贴)。当然,这不是整个计划。这只是调试的步骤。但我相信,这应该足以说明正在发生的事情。
谢谢!学过的知识! – sarora 2014-10-19 20:41:58