semiworking color gradient x2

inc/fdf.h

@@ -63,6 +63,7 @@ typedef struct	s_map
 	int 		x_max;
 	int 		y_max;
 	int 		z_max;
+	int 		z_min;
 }				t_map;
 
 typedef struct	s_mat4
@@ -128,6 +129,7 @@ t_color			color_lerp(t_color c1, t_color c2, float step);
 t_color			int_to_color(int c);
 int				color_to_int(t_color c);
 t_color			choose_color(t_line *line, t_swap *s, t_FDF *FDF);
+void			first_color(t_pnt *pnt, float z, t_map *map);
 
 t_mw			*mlx_and_win_ptr_init(int x, int y);
 t_FDF			*FDF_init(char *path);

src/color.c

@@ -44,20 +44,27 @@ t_color	choose_color(t_line *line, t_swap *s, t_FDF *FDF)
 	FDF = FDF;
 	z1 = line->p1.z;
 	z2 = line->p2.z;
-	if (z2 == 0 && z1 == 0)
-		c = int_to_color(COLOR1);
-	else if (z1 == z2)
-		c = int_to_color(COLOR2);
-	else if (z2 == 0)
-		c = int_to_color(COLOR1);
-	else if (z1 == 0)
-		c = int_to_color(COLOR2);
-	else
-	{
 	if (s->swap_z)
-			c = color_lerp(int_to_color(COLOR2), int_to_color(COLOR1), z1 / z2);
+		if (z2 == 0)
+			c = int_to_color(color_to_int(line->p2.color));
 		else
-			c = color_lerp(int_to_color(COLOR1), int_to_color(COLOR2), z1 / z2);
-	}
+			c = color_lerp(line->p2.color, line->p1.color, z1 / z2);
+	else
+		if (z2 == 0)
+			c = int_to_color(color_to_int(line->p1.color));
+		else
+			c = color_lerp(line->p1.color, line->p2.color, z1 / z2);
 	return (c);
 }
+
+void	first_color(t_pnt *pnt, float z, t_map *map)
+{
+	if (z == map->z_min)
+		pnt->color = int_to_color(COLOR1);
+	if (z == map->z_max)
+		pnt->color = int_to_color(COLOR2);
+	else
+		pnt->color = color_lerp(
+				int_to_color(COLOR1),
+				int_to_color(COLOR2), fabs(z / (map->z_max - map->z_min)));
+}

src/line.c

@@ -4,10 +4,14 @@
 static void	swap_z(t_pnt *p1, t_pnt *p2)
 {
 	float 	tmp;
+	t_color c;
 
 	tmp = p1->z;
 	p1->z = p2->z;
 	p2->z = tmp;
+	c = p1->color;
+	p1->color = p2->color;
+	p2->color = c;
 }
 
 static void	swap_x_y(t_pnt *p1, t_pnt *p2)
@@ -37,7 +41,7 @@ static void	draw_line(t_line *line, t_swap *s, t_FDF *FDF)
 	int dx;
 	int dy;
 	int derr;
-	float dz;
+	double dz;
 
 	dx = abs(line->p2.x - line->p1.x);
 	dy = abs(line->p2.y - line->p1.y);

src/map_init.c

@@ -48,26 +48,31 @@ void	map_dimensions(t_map *map)
 {
 	int 	x;
 	int 	y;
-	int 	z;
+	int 	max_z;
+	int 	min_z;
 	t_list	*l;
 
 	l = map->lst_map;
 	x = 0;
 	y = 0;
-	z = 0;
+	max_z = 0;
+	min_z = 0;
 	while (l)
 	{
 		if (((t_vec *)(l->content))->x > x)
 			x = (int)((t_vec *)(l->content))->x;
 		if (((t_vec *)(l->content))->y > y)
 			y = (int)((t_vec *)(l->content))->y;
-		if (((t_vec *)(l->content))->z > z)
-			z = (int)((t_vec *)(l->content))->z;
+		if (((t_vec *)(l->content))->z > max_z)
+			max_z = (int)((t_vec *)(l->content))->z;
+		if (((t_vec *)(l->content))->z < min_z)
+			min_z = (int)((t_vec *)(l->content))->z;
 		l = l->next;
 	}
 	map->x_max = x;
 	map->y_max = y;
-	map->z_max = z;
+	map->z_max = max_z;
+	map->z_min = min_z;
 }
 
 t_map	*map_init(char *path)

src/pnt_init.c

@@ -6,7 +6,7 @@ void	pnt_init(t_map *map)
 	t_list	*lst_map;
 	int 	i;
 	int 	j;
-
+	float 	z;
 	lst_map = map->lst_map;
 	arr_pnt = malloc(sizeof(t_pnt *) * (map->y_max + 1));
 	i = 0;
@@ -16,7 +16,9 @@ void	pnt_init(t_map *map)
 		arr_pnt[i] = malloc(sizeof(t_pnt) * (map->x_max + 1));
 		while (j <= map->x_max)
 		{
-			arr_pnt[i][j].z = ((t_vec *)(lst_map->content))->z;
+			z = ((t_vec *)(lst_map->content))->z;
+			arr_pnt[i][j].z = z;
+			first_color(&arr_pnt[i][j], z, map);
 			lst_map = lst_map->next;
 			j++;
 		}

src/render.c

@@ -155,7 +155,7 @@ void	render(t_FDF *FDF)
 	rot_z = mat4_init();
 	translate = mat4_init();
 	scale = mat4_init();
-	final = mat4_init();
+	//final = mat4_init();
 	vp = viewport_mat_init(FDF->w_width, FDF->w_height);
 	orth = orth_mat_init(
 			0,