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FreJa

OpenGL am I missing something? (shaders)

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Hey, Trying to make my first glsl app. A simple per fragment lighting on a sphere. I'm using the GLSLShader and GLSLProgram classes from "More OpenGL Game Programming". Here's the code: InitScene
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

	quadric = gluNewQuadric();
	gluQuadricDrawStyle(quadric, GLU_FILL);
	gluQuadricNormals(quadric, GLU_SMOOTH);
	gluQuadricTexture(quadric, GL_TRUE);

	GLSLShader vert("pplight.vs");
	GLSLShader frag("pplight.ps", GL_FRAGMENT_SHADER);
	prog.attach(vert);
	prog.attach(frag);
	prog.link();

	GLfloat lightpos[] = { 1.0, 0.0, 0.0, 0.0 };
	glLightfv(GL_LIGHT0, GL_POSITION, lightpos);
	GLfloat lightcolor[] = { 1.0, 0.0, 0.0, 1.0 };
	glLightfv(GL_LIGHT0, GL_DIFFUSE, lightcolor);
	GLfloat lightspeccolor[] = { 1.0, 1.0, 1.0, 1.0 };
	glLightfv(GL_LIGHT0, GL_SPECULAR, lightspeccolor);




DrawScene
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();

	gluLookAt(0.0f, 0.0f, 4.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f ,0.0f);

	prog.use();
	gluSphere(quadric, 1.0, 60, 60);
	prog.disable();

	glFlush();
	glutSwapBuffers();




pplight.vs
#version 110
varying vec3 normal;
varying vec3 lightVec;
varying vec3 viewVec;

void main(void)
{
	vec4 ecPos = gl_ModelViewMatrix * gl_Vertex;
	normal = normalize(gl_NormalMatrix * gl_Normal);
	lightVec = vec3(normalize(gl_LightSource[0].position - ecPos));
	viewVec = vec3(normalize(-ecPos));
	
	gl_Position = ftransform();
}


pplight.ps
#version 110
varying vec3 normal;
varying vec3 lightVec;
varying vec3 viewVec;

void main(void)
{
	vec3 nnormal = normalize(normal);
	vec3 nlightVec = normalize(lightVec);
	vec3 nviewVec = normalize(viewVec);
	vec3 reflectVec = reflect(-nlightVec, nnormal);
	
	float specValue = clamp(dot(reflectVec, nviewVec), 0.0, 1.0);
	specValue = pow(specValue, 6.0);
	
	gl_FragColor = vec4(gl_LightSource[0].diffuse * diffuseAmount * max(dot(nlightVec, nnormal), 0.0)) +
	(gl_LightSource[0].specular * specAmount * specValue).rgb, 1.0);
}


run it and... no lights! The sphere appears unlit. :( What am I missing? Thanks

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I have no idea, but have you tried enabling lighting? glEnable(GL_LIGHTING) and glEnable(GL_LIGHT0).

and i guess you have made sure there are no compile-errors or linking problems..

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