CODEWITHSUNDEEP
openglglsl
Peter Hwang
Peter Hwang

Reputation: 991

Opengl Shader Basic Computation

OS: Win7 VS 2012

Graphics Card: Inter HD 4000

I have no problem generating an image without any computation. However, when I added p*vPosition for a prospective projection, My window opened and closed immediately after I executed the program. Could anyone point out what I have done wrong? My vshsader.glsl code looks like this:

#version 150

in  vec4 vPosition;
in  vec4 vColor;
out vec4 color;

void main() 
{
    float d = -10.0;
    mat4 p = mat4( 1.0, 0.0, 0.0, 0.0
                   0.0, 0.0, 1.0, 0.0
                   0.0, 0.0, 1.0, 0.0
                   0.0, 0.0, 1/d, 0.0);

  gl_Position = p*vPosition;
  color = vColor;
}

Upvotes: 0

Views: 138

Answers (1)

bwroga
bwroga

Reputation: 5449

You are missing commas at the end of each line of parameters to the mat4 constructor.

It should be:

mat4 p = mat4( 1.0, 0.0, 0.0, 0.0, // <- end with comma
               0.0, 0.0, 1.0, 0.0, // <- end with comma
               0.0, 0.0, 1.0, 0.0, // <- end with comma
               0.0, 0.0, 1/d, 0.0);

Upvotes: 3

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