GLSL 330矩陣計算錯誤{沒有編譯錯誤}

Question

編輯： 好吧現在得到它：D 問題：完全忘記的glm使用colum-major矩陣。只需要將GL_TRUE更改爲GL_FALSE，一切都可以。

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我試圖計算我ModelMatrix我ProjectionMatrix。像這樣：

#version 330 

layout(location = 0) in vec4 position; 
layout(location = 1) in vec4 color; 


uniform mat4 projectionMatrix; //This are the Matrixes from my cpp-app 
uniform mat4 modelMatrix;  //With a debugger that can show all active uniforms i checked their values: They're right! 

uniform mat4 testUni;   //Here I checked if its working when I precompute the model and perspective matrices in my source: works 
mat4 viewMatrix = mat4(1.0f); 

noperspective out vec4 vertColor; 


mat4 MVP = projectionMatrix * modelMatrix ; //Should actually have the same value like testUni 

void main() 
{ 


gl_Position = testUni * position ; //Well... :) Works 
gl_Position = MVP * position ; //Well... :) Doesn't work [Just the perspective Transforn] 


vertColor = position; 
} 

Answer 1

移動的聲明

mat4 MVP = projectionMatrix * modelMatrix ; //Should actually have the same value like testUni 

到main()。着色器執行從main開始。如果您想要避免每個頂點的計算，請預先計算外部矩陣並將其作爲統一提供。