Jinjin He

Jinjin He

A master student at Dartmouth

Software renderer

Published:

I implement a CPU-based software rendering pipeline system from scratch using modern computer graphics theory. The system provides interfaces for image input and output, and is platform-independent. It includes a mathematical template library with various mathematical operations for vectors and matrices, as well as a complete rendering pipeline. During the design process, I implemented a shader interface to facilitate the implementation of additional effects, while ensuring that the code structure is clear and the modules are well-divided, making the system easy to maintain and modify.
Github

How to run

Git clone the code repo and open it in Visual Studio Community IDE.

renderer

Example shader code for Blinn-Phong in our system.

Color Shader::FragmentShader()
{
        Light light({ 10,10,1 }, { 500,500,500 });

        Vector3f l = vector_normalize(light.GetLightV(viewPos));
        Vector3f lightIntensity = light.GetIntensity();
        Vector3f eyePos = vector_normalize(viewPos - Vector3f(0, 0, 0));
        Vector3f h = (l + eyePos) / vector_length_square(l + eyePos);
        float ka = 0.f, kd = 1.f, ks = 0.7f;
        //float r = vector_length_square(l);
        int p = 1;
        float la = 0.2f;
        normal = vector_normalize(normal);
        float ld = kd * std::max(0.f, vector_dot(normal, l));
        float ls = ks * (float)std::pow(std::max(0.f, vector_dot(normal, h)), p);
        float L = la + ld + ls;
        Color textureColor(1.0f, 1.0f, 1.0f);
        if(texture != nullptr)
                 textureColor = texture->GetColor(uvCoord.u, uvCoord.v);
                 
        return Color(color.r * L * textureColor.r, color.g * L * textureColor.g, color.b * L * textureColor.b);
}