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3DFileViewer: Replace lambertian lighting with GL Lighting

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This commit is contained in:
Jesse Buhagiar 2022-01-10 01:13:33 +11:00 • committed by Linus Groh
parent 9aae648482
commit b397db9948
2 changed files with 39 additions and 13 deletions
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16
Userland/Applications/3DFileViewer/Mesh.cpp
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@ -33,13 +33,6 @@ Mesh::Mesh(Vector<Vertex> vertices, Vector<TexCoord> tex_coords, Vector<Vertex>
void Mesh::draw(float uv_scale)
{
// Light direction
const FloatVector3 light_direction(1.f, 1.f, 1.f);
// Mesh color
const FloatVector4 mesh_ambient_color(0.2f, 0.2f, 0.2f, 1.f);
const FloatVector4 mesh_diffuse_color(0.6f, 0.6f, 0.6f, 1.f);
for (u32 i = 0; i < m_triangle_list.size(); i++) {
const auto& triangle = m_triangle_list[i];
@ -83,17 +76,14 @@ void Mesh::draw(float uv_scale)
normal = vec_ab.cross(vec_ac).normalized();
}
// Compute lighting with a Lambertian color model
const auto light_intensity = max(light_direction.dot(normal), 0.f);
const FloatVector4 color = mesh_ambient_color
+ mesh_diffuse_color * light_intensity;
glBegin(GL_TRIANGLES);
glColor4f(color.x(), color.y(), color.z(), color.w());
if (is_textured())
glTexCoord2f(m_tex_coords.at(triangle.tex_coord_index0).u * uv_scale, (1.0f - m_tex_coords.at(triangle.tex_coord_index0).v) * uv_scale);
// Upload the face normal
glNormal3f(normal.x(), normal.y(), normal.z());
// Vertex 1
glVertex3f(
m_vertex_list.at(triangle.a).x,