[FDF] ft_make_draw_dot

일단 2차원 을 그려보자

 

https://github.com/liebespaar93/FDF

GitHub - liebespaar93/FDF

만들어야 할거

- 지금 위치와 다음 위치를 선을 그어야 한다

- 선을 그을떄 비율을 계산해서 긴거에 맞게 그려준다

- 선에 값에 따라 색을 만들어준다

 

일단 선이 이어져 있는곳을 다 찾는다

#include <ft_draw.h>
#include <stdio.h>
#define COLOR_RATIO 5;

t_dot   ft_symtax_pixel(t_dot dot)
{
    dot.x *= LINE_SIZE;
    dot.y *= LINE_SIZE;
    dot.z *= COLOR_RATIO;
    return (dot);
}

void ft_draw_dot_auto(t_param *param, t_dot *head_dot)
{
    t_dot   *tmp_dot;

    while (head_dot)
    {
        tmp_dot = head_dot;
        while (tmp_dot)
        {
            if (tmp_dot->x_p)
                ft_auto_line_draw(param, ft_symtax_pixel(*tmp_dot), ft_symtax_pixel(*(tmp_dot->x_p)));
            if (tmp_dot->y_p)
                ft_auto_line_draw(param, ft_symtax_pixel(*tmp_dot), ft_symtax_pixel(*(tmp_dot->y_p)));
            tmp_dot = tmp_dot->x_p;
        }
        head_dot = head_dot->y_p;
    }
}

 

지금 위치와 목적지를 구하여  하나하나 점을 넣어준다

#include <ft_draw.h>

void    ft_auto_pixel_put(t_param *param, t_dot position_dot, int color)
{
    mlx_pixel_put(param->mlx_ptr, param->win_ptr, position_dot.x, position_dot.y + 10, ft_draw_color(color));
}

void    ft_auto_line_draw(t_param *param, t_dot position_dot, t_dot next_dot)
{
    float   x_allow;
    float   y_allow;
    float   z_allow;
    t_ratio c_ratio;

    ft_ratio_init(&c_ratio, position_dot, next_dot);
    x_allow = -ft_sign(position_dot.x - next_dot.x);
    y_allow = -ft_sign(position_dot.y - next_dot.y);
    z_allow = -ft_sign(position_dot.z - next_dot.z);
    if (ft_abs(position_dot.x - next_dot.x) > ft_abs(position_dot.y - next_dot.y))
    {
        while (position_dot.x != next_dot.x)
        {
            ft_auto_pixel_put(param, position_dot, position_dot.z);
            position_dot.x += x_allow;
            position_dot.y += y_allow * c_ratio.y;
            position_dot.z += z_allow * c_ratio.z;
        }
    }
    else
    {
        while (position_dot.y != next_dot.y)
        {
            ft_auto_pixel_put(param, position_dot, position_dot.z);
            position_dot.y += y_allow;
            position_dot.x += x_allow * c_ratio.x;
            position_dot.z += z_allow * c_ratio.z;
        }
    }
}

더 긴부분을 참고하여 비율을 만든다

#include <ft_draw.h>

t_ratio    ft_ratio_init(t_ratio *c_ratio, t_dot position_dot, t_dot next_dot)
{
    c_ratio->x = ft_ratio(position_dot.x - next_dot.x, position_dot.y - next_dot.y);
    c_ratio->y = ft_ratio(position_dot.y - next_dot.y, position_dot.x - next_dot.x);
    if (ft_abs(position_dot.x - next_dot.x) > ft_abs(position_dot.y - next_dot.y))
        c_ratio->z = ft_ratio(position_dot.z - next_dot.z, position_dot.x - next_dot.x);
    else 
        c_ratio->z = ft_ratio(position_dot.z - next_dot.z, position_dot.y - next_dot.y);
    return (*c_ratio);
}

이제 넣을 곳에 색을 비율에 맞게 넣어준다

#include <ft_draw.h>

int ft_draw_color(int num)
{
    t_color c_color;
    int     flag;

    flag = 1;
    c_color.num = 0x0000FF00;
    if (num > 0)
    {
        while (num--)
        {
            if (c_color.s_bit.r < 0xFF)
                c_color.s_bit.r++;
            else if (c_color.s_bit.g > 0 && c_color.s_bit.b == 0)
                c_color.s_bit.g--;
            else if (c_color.num < 0x00FFFFFF && ++c_color.s_bit.b)
                c_color.s_bit.g++;
            else
                break ;
        }
    }
    else
    {
        while (num++)
        {
            if (c_color.s_bit.b < 0xFF)
                c_color.s_bit.b++;
            else if (c_color.s_bit.g > 0)
                c_color.s_bit.g--;
            else if (c_color.num > 0x00000000)
                c_color.s_bit.b--;
            else
                break ;
        }
    }
    return (c_color.num);
}

색상은 원하는걸로 만들기  순차적으로 오르거나 내리는것이 이쁘다

끝!