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2016-04-09

Re: Problem with shader.

Originally Posted By: lucaseverini

Original Date: April 22, 2014 at 12:43 AM

Nevermind. I solved it.

'''Originally Posted By: lucaseverini''' '''Original Date: April 22, 2014 at 12:43 AM''' Nevermind. I solved it.

Problem with shader

Originally Posted By: lucaseverini

Original Date: April 21, 2014 at 11:06 PM

Hi everyone,

I have a problem trying to use the shader example app, FragmentApp.
I'm working on MacOS 10.8.5. Homework 1 ran fine on it so I don't think is something related to the guest OS. Hopefully…
I have this vertex shader:

// Vertex Shader
// This version GLSLanguage-v2 compliant program is used when g_Gl2Compatible is true

uniform mat4 uProjMatrix;
uniform mat4 uModelViewMatrix;

attribute vec3 aPosition;

varying vec3 vPosition;

void main()
{
vec4 tPosition = uModelViewMatrix * vec4(aPosition, 1.0);
vPosition = vec3(tPosition);
gl_Position = uProjMatrix * tPosition;
}

And this fragment shader:

// Fragment Shader
// This version GLSLanguage-v2 compliant program is used when g_Gl2Compatible is true

varying vec3 vPosition;

void main()
{
if(vPosition.y OK

const GLuint h = program; // short hand

h_uProjMatrix = safe_glGetUniformLocation(h, "uProjMatrix"); --> OK
cout THIS RETURNS 10
checkGlErrors(); - --> ERROR AND EXCEPTION INSIDE HERE
…

Any help is very welcome…
Thank you!

Luca

'''Originally Posted By: lucaseverini''' '''Original Date: April 21, 2014 at 11:06 PM''' Hi everyone, I have a problem trying to use the shader example app, FragmentApp. I'm working on MacOS 10.8.5. Homework 1 ran fine on it so I don't think is something related to the guest OS. Hopefully… I have this vertex shader: // Vertex Shader // This version GLSLanguage-v2 compliant program is used when g_Gl2Compatible is true uniform mat4 uProjMatrix; uniform mat4 uModelViewMatrix; attribute vec3 aPosition; varying vec3 vPosition; void main() { vec4 tPosition = uModelViewMatrix * vec4(aPosition, 1.0); vPosition = vec3(tPosition); gl_Position = uProjMatrix * tPosition; } And this fragment shader: // Fragment Shader // This version GLSLanguage-v2 compliant program is used when g_Gl2Compatible is true varying vec3 vPosition; void main() { if(vPosition.y OK const GLuint h = program; // short hand h_uProjMatrix = safe_glGetUniformLocation(h, "uProjMatrix"); --> OK cout THIS RETURNS 10 checkGlErrors(); - --> ERROR AND EXCEPTION INSIDE HERE … Any help is very welcome… Thank you! Luca