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Code Issues Releases Wiki Activity

Added Phong refelction to the TinyRenderer Shader.

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This commit is contained in:
Ian Wilkes 2016-09-02 11:41:18 -07:00
parent ba583feb7f
commit 2336be02e4
1 changed files with 22 additions and 18 deletions
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40
examples/TinyRenderer/TinyRenderer.cpp
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@ -43,26 +43,22 @@ struct Shader : public IShader {
{
m_invModelMat = m_modelMat.invert_transpose();
}
virtual Vec4f vertex(int iface, int nthvert) {
Vec2f uv = m_model->uv(iface, nthvert);
//printf("uv = %f,%f\n", uv.x,uv.y);
Vec2f uv = m_model->uv(iface, nthvert);
varying_uv.set_col(nthvert, uv);
//varying_nrm.set_col(nthvert, proj<3>((m_projectionMatrix*m_modelView).invert_transpose()*embed<4>(m_model->normal(iface, nthvert), 0.f)));
varying_nrm.set_col(nthvert, proj<3>(m_invModelMat*embed<4>(m_model->normal(iface, nthvert), 0.f)));
//m_localNormal = m_model->normal(iface, nthvert);
//varying_nrm.set_col(nthvert, m_model->normal(iface, nthvert));
Vec3f unScaledVert = m_model->vert(iface, nthvert);
Vec3f scaledVert=Vec3f(unScaledVert[0]*m_localScaling[0],unScaledVert[1]*m_localScaling[1],unScaledVert[2]*m_localScaling[2]);
Vec4f gl_Vertex = m_projectionMatrix*m_modelView1*embed<4>(scaledVert);
//m_localNormal = m_model->normal(iface, nthvert);
//varying_nrm.set_col(nthvert, m_model->normal(iface, nthvert));
Vec3f unScaledVert = m_model->vert(iface, nthvert);
Vec3f scaledVert=Vec3f(unScaledVert[0]*m_localScaling[0],
unScaledVert[1]*m_localScaling[1],
unScaledVert[2]*m_localScaling[2]);
Vec4f gl_Vertex = m_projectionMatrix*m_modelView1*embed<4>(scaledVert);
varying_tri.set_col(nthvert, gl_Vertex);
//ndc_tri.set_col(nthvert, proj<3>(gl_Vertex/gl_Vertex[3]));
return gl_Vertex;
}
@ -70,9 +66,17 @@ struct Shader : public IShader {
Vec3f bn = (varying_nrm*bar).normalize();
Vec2f uv = varying_uv*bar;
float ambient = 0.7;
float intensity = ambient + (1-ambient)*b3Min(b3Max(bn*m_light_dir_local, -1.f), 1.f);
color = m_model->diffuse(uv)*intensity;
Vec3f reflection_direction = (bn * (bn * m_light_dir_local * 2.f) - m_light_dir_local).normalize();
float specular = pow(b3Max(reflection_direction.z, 0.f), m_model->specular(uv));
float diffuse = b3Max(0.f, bn * m_light_dir_local);
float ambient_coefficient = 0.6;
float diffuse_coefficient = 0.35;
float specular_coefficient = 0.05;
float intensity = ambient_coefficient + b3Min(diffuse * diffuse_coefficient + specular * specular_coefficient, 1.0f - ambient_coefficient);
color = m_model->diffuse(uv) * intensity;
//warning: bgra color is swapped to rgba to upload texture
color.bgra[0] *= m_colorRGBA[0];