files restructuration

1 files changed, 107 insertions, 0 deletions

diff --git a/src/render.c b/src/render.c
new file mode 100644
index 0000000..88b0cae
--- /dev/null
+++ b/src/render.c
@@ -0,0 +1,107 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   render.c                                           :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/01/11 13:37:17 by cacharle          #+#    #+#             */
+/*   Updated: 2020/01/30 15:17:49 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "cub3d.h"
+
+int		render_update(void *param)
+{
+	t_state *state;
+
+	state = param;
+	if (!state->running)
+	{
+		state_destroy(state);
+		exit(EXIT_SUCCESS);
+		return (0);
+	}
+	render_update_window(state);
+	mlx_put_image_to_window(state->mlx_ptr, state->window_ptr, state->window.id, 0, 0);
+	return (0);
+}
+
+void	render_update_window(t_state *state)
+{
+	int x;
+
+	x = -1;
+	while (++x < state->window.width)
+		render_column(state, x);
+}
+
+void	render_column(t_state *state, int x)
+{
+	t_render_state	rstate;
+
+	rstate.x = x;
+	rstate_ray(state, &rstate);
+	rstate.map_pos = vector_new((double)((int)state->pos.x), (double)((int)state->pos.y)); //floor?
+	rstate_delta(&rstate);
+	rstate_init_probe(state, &rstate);
+	rstate.map_step = vector_new(rstate.ray.x < 0.0 ? -1.0 : 1.0, rstate.ray.y < 0.0 ? -1.0 : 1.0);
+	while (TRUE)
+	{
+		rstate.side = rstate.probe.x < rstate.probe.y ? SIDE_WE : SIDE_NS;
+		rstate_next_probe(&rstate);
+		if (state->map[(int)rstate.map_pos.y][(int)rstate.map_pos.x] == CELL_WALL)
+			break ;
+	}
+	rstate_perp_dist(state, &rstate);
+	rstate_line_height(state, &rstate);
+	rstate.draw_start = state->window.height / 2 - rstate.line_height / 2;
+	rstate.draw_end = state->window.height / 2 + rstate.line_height / 2;
+	if (rstate.draw_start < 0)
+		rstate.draw_start = 0;
+	if (rstate.draw_end > state->window.height - 1)
+		rstate.draw_end = state->window.height - 1;
+	render_window_column(state, &rstate);
+}
+
+void	render_window_column(t_state *state, t_render_state *rstate)
+{
+	int		i;
+	t_color	white;
+
+	white.hexcode = 0x00ffffff;
+	i = 0;
+	while (i < rstate->draw_start)
+		((t_color*)state->window.data)[i++ * state->window.width + rstate->x] = state->ceilling_color;
+	while (i < rstate->draw_end)
+		((t_color*)state->window.data)[i++ * state->window.width + rstate->x] = white;
+	render_texture(state, rstate);
+	i = rstate->draw_end;
+	while (i < state->window.height)
+		((t_color*)state->window.data)[i++ * state->window.width + rstate->x] = state->floor_color;
+
+}
+
+void	render_texture(t_state *state, t_render_state *rstate)
+{
+	int 	i;
+	double	step;
+	double	tex_pos;
+	int		tex_y;
+	int		tex_x;
+	t_image	*texture;
+
+	texture = get_tex(state, rstate);
+	tex_x = get_tex_x(state, rstate, texture);
+	step = 1.0 * texture->height / rstate->line_height;
+	tex_pos = (rstate->draw_start - state->window.height / 2 + rstate->line_height / 2) * step;
+	i = rstate->draw_start - 1;
+	while (++i < rstate->draw_end)
+	{
+		tex_y = (int)tex_pos & (texture->height - 1);
+		tex_pos += step;
+		((t_color*)state->window.data)[i * state->window.width + rstate->x] =
+			((t_color*)texture->data)[texture->height * tex_y + tex_x];
+	}
+}