cube-game-plus-plus/client/rendering/NormalTexture.cpp

#include <cmath>
#include <iostream>

#include "client/rendering/NormalTexture.h"
#include "client/utils/PNGReader.h"

NormalTexture::NormalTexture(const char* path) : texture(Texture::NEAREST) {
    u32 maxWidth = 256;
    u32 maxHeight = 256;
    u32 buffer[256 * 256];
    if(PNGReader::load(path, buffer, maxWidth, maxHeight)) {
        for(uint x = 0; x < maxWidth; x++) {
            for(uint y = 0; y < maxHeight; y++) {
                /*float fx = (x % 16) * (2.0f * M_PIf32 / 15.0f);
                
                float fb = (sinf(fx) + 1.0f) * 0.5f;
                
                uint r = 0;
                uint g = sqrtf(1 - fb * fb) * 255.0f;
                uint b = fb * 255.0f;
                if(y == 0)
                    std::cout << x << " " << fb << "\n";
                buffer[y * maxWidth + x] = (b << 16) | (g << 8) | r;*/
                buffer[y * maxWidth + x] = 0x00FF00;
            }
        }
        texture.setRGBAData(maxWidth, maxHeight, buffer);
    }
}

void NormalTexture::bind(uint index) const {
    texture.bind(index);
}