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This commit is contained in:
Jack Ha 2016-12-20 11:45:05 +01:00
parent 958187eb5d
commit 61dcaf8811
4 changed files with 164 additions and 13 deletions
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53
resources/shaders/overhang.shader
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@ -20,6 +20,40 @@ vertex =
v_normal = (u_normalMatrix * normalize(a_normal)).xyz;
}
geometry =
#version 410
layout(triangles) in;
layout(triangle_strip, max_vertices = 6) out;
in vec3 v_normal[];
in vec3 v_vertex[];
out vec3 f_normal;
out vec3 f_vertex;
void main()
{
int i;
for(i = 0; i < 3; i++)
{
f_normal = v_normal[i];
f_vertex = v_vertex[i];
gl_Position = gl_in[i].gl_Position + vec4(-50, 0.0, 0.0, 0.0);
EmitVertex();
}
EndPrimitive();
for(i = 0; i < 3; i++)
{
f_normal = v_normal[i];
f_vertex = v_vertex[i];
gl_Position = gl_in[i].gl_Position + vec4(50, 0.0, 0.0, 0.0);
EmitVertex();
}
EndPrimitive();
}
fragment =
uniform mediump vec4 u_ambientColor;
uniform mediump vec4 u_diffuseColor;
@ -31,27 +65,28 @@ fragment =
uniform lowp float u_overhangAngle;
uniform lowp vec4 u_overhangColor;
varying highp vec3 v_vertex;
varying highp vec3 v_normal;
varying highp vec3 f_vertex;
varying highp vec3 f_normal;
void main()
{
mediump vec4 finalColor = vec4(0.0);
/* Ambient Component */
// Ambient Component
finalColor += u_ambientColor;
highp vec3 normal = normalize(v_normal);
highp vec3 lightDir = normalize(u_lightPosition - v_vertex);
highp vec3 normal = normalize(f_normal);
highp vec3 lightDir = normalize(u_lightPosition - f_vertex);
/* Diffuse Component */
// Diffuse Component
highp float NdotL = clamp(abs(dot(normal, lightDir)), 0.0, 1.0);
finalColor += (NdotL * u_diffuseColor);
/* Specular Component */
/* TODO: We should not do specularity for fragments facing away from the light.*/
// Specular Component
// TODO: We should not do specularity for fragments facing away from the light.
highp vec3 reflectedLight = reflect(-lightDir, normal);
highp vec3 viewVector = normalize(u_viewPosition - v_vertex);
highp vec3 viewVector = normalize(u_viewPosition - f_vertex);
highp float NdotR = clamp(dot(viewVector, reflectedLight), 0.0, 1.0);
finalColor += pow(NdotR, u_shininess) * u_specularColor;