First of all i'd like to thank everyone for their help!
glewInit() was the issue, and i wouldn't have known about it without your help.
@tanzanite7 Your right, the problem is with the placement of glewInit(). glewInit() needs to be called
before " shader.init("shader.vert", "shader.frag"); ", not after.
Good news - the shader now compiles.
Bad news - the shader isn't performing correctly.
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This is the default opengl per-vertex shading. It may look like decent lighting, however, it is extremely jumpy when moving the light and completely unreliable ->
This is the new shader implemented, wanting to produce PPL ->
The light is simply a spot-light positioned over the green cube. I dont know why the shader produced all black and gray pixels.
Here are the
.vert and
.frag files used in the shader->
.vert
varying vec3 lightDir,normal;
void main()
{
normal = normalize(gl_NormalMatrix * gl_Normal);
lightDir = normalize(vec3(gl_LightSource[0].position));
gl_TexCoord[0] = gl_MultiTexCoord0;
gl_Position = ftransform();
}
varying vec3 lightDir,normal;
uniform sampler2D tex;
void main()
{
vec3 ct,cf;
vec4 texel;
float intensity,at,af;
intensity = max(dot(lightDir,normalize(normal)),0.0);
cf = intensity * (gl_FrontMaterial.diffuse).rgb +
gl_FrontMaterial.ambient.rgb;
af = gl_FrontMaterial.diffuse.a;
texel = texture2D(tex,gl_TexCoord[0].st);
ct = texel.rgb;
at = texel.a;
gl_FragColor = vec4(ct * cf, at * af);
}
