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fix shaders for proper lighting computation

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This commit is contained in:
Josh Holtrop 2011-05-05 13:56:57 -04:00
parent 2e2b8225be
commit 59d0d66c44
2 changed files with 6 additions and 6 deletions
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8
f_shader.glsl
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@ -2,7 +2,7 @@
uniform vec4 ambient, diffuse, specular;
uniform float shininess;
varying vec3 eye_pos_i;
varying vec3 pos_i;
varying vec3 normal_i;
void main(void)
@ -11,7 +11,7 @@ void main(void)
vec4 color;
float NdotL, RdotEye;
lightDir = vec3(-0.1, 0, -0.9);
lightDir = normalize(vec3(-0.1, 0, -0.9));
color = ambient; /* ambient light */
n = normalize(normal_i);
@ -22,10 +22,10 @@ void main(void)
/* diffuse component */
color += diffuse * NdotL;
/* specular component */
RdotEye = dot(normalize(eye_pos_i), normalize(reflect(-lightDir, n)));
RdotEye = dot(normalize(-pos_i), normalize(reflect(-lightDir, n)));
if (RdotEye > 0.0)
{
color += specular * pow(RdotEye, shininess);
color += clamp(specular * pow(RdotEye, shininess), 0.0, 1.0);
}
}

4
v_shader.glsl
View File

@ -2,12 +2,12 @@
attribute vec3 pos;
attribute vec3 normal;
varying vec3 eye_pos_i;
varying vec3 pos_i;
varying vec3 normal_i;
void main(void)
{
gl_Position = gl_ModelViewProjectionMatrix * vec4(pos, 1);
eye_pos_i = vec3(gl_Position.x, gl_Position.y, gl_Position.z);
pos_i = vec3(gl_Position.x, gl_Position.y, gl_Position.z);
normal_i = gl_NormalMatrix * normal;
}