diff options
Diffstat (limited to 'src/texture.c')
| -rw-r--r-- | src/texture.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/texture.c b/src/texture.c new file mode 100644 index 0000000..725e0aa --- /dev/null +++ b/src/texture.c @@ -0,0 +1,55 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* texture.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2020/02/01 11:38:43 by cacharle #+# #+# */ +/* Updated: 2020/02/01 12:24:40 by cacharle ### ########.fr */ +/* */ +/* ************************************************************************** */ + +#include "cub3d.h" + +t_image *texture_select(t_state *state, t_render_state *rstate) +{ + if (rstate->side == SIDE_NS) + { + if (rstate->map_pos.y < state->pos.y) + return (state->textures + TEX_NORTH); + else + return (state->textures + TEX_SOUTH); + } + else if (rstate->side == SIDE_WE) + { + if (rstate->map_pos.x > state->pos.x) + return (state->textures + TEX_WEST); + else + return (state->textures + TEX_EAST); + } + return (NULL); +} + +/* +** Since we're drawing each column, all the texels we want to draw on the window +** are on a single column of the texture. +** First we find the x-coord relative to the wall we hit +*/ + +int texture_x(t_state *state, t_render_state *rstate, t_image *texture) +{ + int tex_x; + double wall_x; + + if (rstate->side == SIDE_WE) + wall_x = state->pos.y + rstate->perp_dist * rstate->ray.y; + else + wall_x = state->pos.x + rstate->perp_dist * rstate->ray.x; + wall_x -= floor(wall_x); + tex_x = (int)(wall_x * (double)texture->width); + if ((rstate->side == SIDE_NS && rstate->ray.x > 0) || + (rstate->side == SIDE_WE && rstate->ray.y < 0)) + tex_x = texture->width - tex_x - 1; + return (tex_x); +} |