着色器乘法矩阵
我有一个问题我不明白。
我有一个着色器，
String[] vsSource = new String[] {
"attribute vec3 aVertex;",
"attribute vec3 aColor;",
"uniform mat4 uMVMatrix;",
"uniform mat4 uPMatrix;",
"varying vec3 vColor;",
"void main(void) {",
" vColor = aColor;",
" gl_Position = uMVMatrix * uPMatrix * vec4(aVertex, 1.0);",
"}" };
我设置了两个矩阵 uMVMatrix 和 uPMatrix，我想在着色器中将它们相乘。当我尝试这样做时，我的屏幕保持黑屏。
当我在 Java 中将其相乘并将其传递给一个 mat4 变量时，我看到了我的三角形。
String[] vsSource = new String[] {
"attribute vec3 aVertex;",
"attribute vec3 aColor;",
"uniform mat4 mvpMatrix;",
"varying vec3 vColor;",
"void main(void) {",
" vColor = aColor;",
" gl_Position = mvpMatrix * vec4(aVertex, 1.0);",
"}" };
有人可以告诉我为什么我不能在着色器中将它们相乘吗？
I have an issue I don't understand.
I have a shader
String[] vsSource = new String[] {
"attribute vec3 aVertex;",
"attribute vec3 aColor;",
"uniform mat4 uMVMatrix;",
"uniform mat4 uPMatrix;",
"varying vec3 vColor;",
"void main(void) {",
" vColor = aColor;",
" gl_Position = uMVMatrix * uPMatrix * vec4(aVertex, 1.0);",
"}" };
I set both matrices uMVMatrix and uPMatrix and I want to multiply them in the shader. When I try that, my screen stay black.
When I multiply it in Java and pass it to one mat4 variable, I see my triangle.
String[] vsSource = new String[] {
"attribute vec3 aVertex;",
"attribute vec3 aColor;",
"uniform mat4 mvpMatrix;",
"varying vec3 vColor;",
"void main(void) {",
" vColor = aColor;",
" gl_Position = mvpMatrix * vec4(aVertex, 1.0);",
"}" };
Can someone tell me why I can't multiply them in the shader?
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尝试反转着色器中矩阵的顺序，即
Try inverting the order of the matrices in the shader, i.e.