stick with the colors

includes/fdf.h

@@ -76,6 +76,11 @@ int		**parse_map(t_fdf *fdf, int fd);
 // color for altitude
 # define COLOR_START		0xffffff
 # define COLOR_END			0x00d700
+// R,G,B colors
+// ex for col = 0x236ad0
+# define COLOR_R(col)		((col & 0xff0000) >> 16)	// output 23
+# define COLOR_G(col)		((col & 0x00ff00) >> 8)		// output 6a
+# define COLOR_B(col)		(col & 0x0000ff)					// output d0
 
 # define ESCAPE			65307
 # define UP				65362

srcs/draw_bonus.c

@@ -39,13 +39,27 @@ void	draw_grid(t_fdf *fdf, int i, int j)
 	draw_lines(fdf, point_start, point_end);
 	free(point_start);
 	free(point_end);
+
+/*
+const char c = 'w';
+const int n = 23;
+const char *s = "hello";
+ft_putchar(c);								ft_putchar_fd(',',1);
+ft_putchar_fd(c, 1);					ft_putchar_fd('\n',1);
+ft_putnbr(n);									ft_putchar_fd(',',1);
+ft_putnbr_fd(n, 1);						ft_putchar_fd('\n',1);
+ft_putstr(s);									ft_putchar_fd(',',1);
+ft_putstr_fd(s, 1);						ft_putchar_fd('\n',1);
+ft_putnbrbase(n, "01");				ft_putchar_fd(',',1);
+ft_putnbrbase_fd(n, "01", 1);	ft_putchar_fd('\n',1);
 ft_putchar_fd('\n',1);
+*/
 }
 
-// return the position of the point X
+// return the position of the point p
 // in percentage of the total height of the map :
 //   z_min---start---point---end----z_max
-//   0%--------s%-----P-------e%-----100%
+//   0%--------s%-----p-------e%-----100%
 //   line:       -------------
 //           ex. . . . . . ---e
 //                      ---   .
@@ -117,7 +131,15 @@ void	draw_lines(t_fdf *fdf, int *start, int *end)
 	int	dy;
 	int	i;
 	int	j;
-	int	z;
+	int	percent;
+
+/*
+int	color_r, color_g, color_b;
+color_r = rand() % 0xff + 1;
+color_g = rand() % 0xff + 1;
+color_b = rand() % 0xff + 1;
+int	color = (color_r << 16) + (color_g << 8) + color_b;
+*/
 
 	if (end)
 	{
@@ -134,28 +156,60 @@ ft_putnbr_fd(fdf->min_z,1);
 ft_putchar_fd(',',1);
 ft_putnbr_fd(fdf->max_z,1);
 ft_putchar_fd(')',1);
-*/
 
+ft_putstr("\ndraw line\n");
+*/
 		i = 0;
 		j = 0;
 		while (ft_abs(i) <= ft_abs(dx) && ft_abs(j) <= ft_abs(dy))
 		{
-			z = color_percent(fdf, start, end, ft_abs(i) + ft_abs(j), ft_abs(dx) + ft_abs(dy));
-			draw_color_pixel(fdf, start[0] + i, start[1] + j, z);
+			percent = color_percent(fdf, start, end, ft_abs(i) + ft_abs(j), ft_abs(dx) + ft_abs(dy));
+			draw_color_pixel(fdf, start[0] + i, start[1] + j, percent);
+			//draw_color_pixel(fdf, start[0] + i, start[1] + j, color);
 			if (!ft_abs(dx) || ft_abs(j) < ft_abs(i * dy / dx))
 				j += ft_sign(dy);
 			else
 				i += ft_sign(dx);
 		}
 	}
+/*
+ft_putstr("\nEND line\n");
+*/
 }
 
-void	draw_color_pixel(t_fdf *fdf, int new_x, int new_y, int z)
+int	get_primary_color(char primar, int percent)
 {
+	int	start_color;
+	int	end_color;
+	int	new_primary_color;
+	int	offset;
+
+	if ((primar == 'r') | (primar == 'R'))
+		offset = 16;
+	else if ((primar == 'g') | (primar == 'G'))
+		offset = 8;
+	else if ((primar == 'b') | (primar == 'B'))
+		offset = 0;
+
+	start_color = (COLOR_START & (0x000000ff << offset)) >> offset;
+	end_color = (COLOR_END & (0x000000ff << offset)) >> offset;
+	
+	new_primary_color = (end_color - start_color) * percent / 100;
+	new_primary_color = start_color + new_primary_color;
+	return (new_primary_color);
+}
+
+void	draw_color_pixel(t_fdf *fdf, int new_x, int new_y, int percent)
+{
+	int	color_r;
+	int	color_g;
+	int	color_b;
 	int	color;
 
-	color = COLOR_START;
 /*
+	color = COLOR_START;
+	color = 0x236ad0;
+
 	int	color_start;
 	int	color_end;
 
@@ -165,10 +219,59 @@ void	draw_color_pixel(t_fdf *fdf, int new_x, int new_y, int z)
 	int color_g;
 	int color_b;
 
+// color masks
+# define R_MASK			0xff0000
+# define G_MASK			0x00ff00
+# define B_MASK			0x0000ff
+
+start: 245  0   | 0            | ?    0    ?=0 | ?    50   ?=70 | ?    30   ?=42 |
+end  : 105  100 | 105-245=-140 | 140  100      | 140  100       | 140  100       |
+
+start: 245  0   | 0            | ?    0    ?=0 | ?    50  ?=-70 | ?    30  ?=-42 |
+end  : 105  100 | 105-245=-140 | -140 100      | -140 100       | -140 100       |
+
+start: 105  0   | 0            | ?    0    ?=0 | ?    50   ?=70 | ?    30   ?=42 |
+end  : 245  100 | 245-105=140  | 140  100      | 140  100       | 140  100       |
+
+(end - start) * percent / 100
+
+
+ft_putchar('[');
+ft_putnbrbase(COLOR_START, "0123456789abcdef");
+ft_putchar(',');
+ft_putnbrbase(COLOR_END, "0123456789abcdef");
+ft_putchar(',');
+ft_putnbrbase(get_primary_color('r', percent), "0123456789abcdef");
+ft_putchar(',');
+ft_putnbrbase(get_primary_color('g', percent), "0123456789abcdef");
+ft_putchar(',');
+ft_putnbrbase(get_primary_color('b', percent), "0123456789abcdef");
+ft_putchar(',');
+ft_putnbrbase((get_primary_color('r', percent)<<16) + (get_primary_color('g', percent)<<8) + get_primary_color('b', percent), "0123456789abcdef");
+ft_putchar(']');
+*/
+
+	/*
+	*/
+	color_r = get_primary_color('r', percent);
+	color_g = get_primary_color('g', percent);
+	color_b = get_primary_color('b', percent);
+	color = (color_r << 16) + (color_g << 8) + color_b;
+
+/*
+ft_putchar('[');
+ft_putnbr(percent);
+ft_putchar(',');
+ft_putnbrbase(color, "0123456789abcdef");
+ft_putchar(']');
+*/
+
+/*
+01 10 01 01
+00 11 11 11
+-----------
+00 10 01 01
 */
-	color = color ^ (((0xff / fdf->z_amplitude) * (z - fdf->min_z)) << 16);
-	color = color ^ (((0xff / fdf->z_amplitude) * (z - fdf->min_z)) << 8);
-	color = color ^ (((0xff / fdf->z_amplitude) * (z - fdf->min_z)) << 0);
 
 /*
 	int	color;