src/fb/chfb.cpp


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#include "fb/chfb.h"
#include <array>
#include <cmath>
#include <vector>
#include "math/vector.h"
#include "o3d/vertex.h"
#include "o3d/tri_vertex.h"
#include "o3d/vertex_data.h"

using namespace engine::fb;

CharacterFrameBuffer::CharacterFrameBuffer(unsigned int w, unsigned int h) {
    resize(w, h);
}

void CharacterFrameBuffer::resize(unsigned int w, unsigned int h) {
    this->w = w;
    this->h = h;
    chars_vector.resize(w * h);
    clear();
}

unsigned int CharacterFrameBuffer::width() const {
    return w;
}

unsigned int CharacterFrameBuffer::height() const {
    return h;
}

const char* CharacterFrameBuffer::chars() const {
    return chars_vector.data();
}

void CharacterFrameBuffer::clear() {
    std::fill(chars_vector.begin(), chars_vector.end(), ' ');
}

void CharacterFrameBuffer::draw_point(int x, int y, engine::math::Vector3 loc, const engine::o3d::VertexData& vd) {
    (void) vd;
    chars_vector[x + y * w] = face_char(static_cast<int>(loc.x));
}

char CharacterFrameBuffer::face_char(int face_ind) const {
    int n = 1 + face_ind / 2;
    return (n < 10 ? '0' : 'A' - 10) + n;
}