ugBASIC 1.18
An isomorphic BASIC language compiler for retrocomputers
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tile_at.c
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1/*****************************************************************************
2 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers *
3 *****************************************************************************
4 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
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10 * http://www.apache.org/licenses/LICENSE-2.0
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31/****************************************************************************
32 * INCLUDE SECTION
33 ****************************************************************************/
34
35#include "../../ugbc.h"
36
37/****************************************************************************
38 * CODE SECTION
39 ****************************************************************************/
40
49/* <usermanual>
50@keyword TILE AT
51
52@english
53This function allows you to know which is the tile drawn at a certain position
54on the tilemap. Since it is possible to draw both single ''TILE'' and ''TILES'',
55the information on the drawn tile is not, automatically, the identifier of a
56TILES but it is the single tile of which it is formed. To know if the tile belongs to a
57group of tiles it is necessary to use the ''TILES BELONG'' function.
58
59@italian
60Questa funzione permette di conoscere qual è il tile disegnato a una certa posizione
61sulla tilemap. Siccome è possibile disegnare sia singoli ''TILE'' che ''TILES'',
62l'informazione sul tile disegnato non è, automaticamente, l'identificatore di un
63''TILES'' ma è il singolo tile di cui è formato. Per sapere se il tile appartiene
64a un gruppo di tiles è necessario utilizzare la funzione ''TILES BELONG''.
65
66@syntax = TILE AT([x],[y])
67
68@example tile = TILE AT( 10,10 )
69
70@target c128
71</usermanual> */
72Variable * tile_at( Environment * _environment, char * _x, char * _y ) {
73
74 Variable * x = variable_retrieve_or_define( _environment, _x, VT_POSITION, 0 );
75 Variable * y = variable_retrieve_or_define( _environment, _y, VT_POSITION, 0 );
76 Variable * result = variable_temporary( _environment, VT_TILE, "(tileAt)");
77
78 vic2_tile_at( _environment, x->realName, y->realName, result->realName );
79
80 return result;
81
82}
83
84
Variable * variable_retrieve_or_define(Environment *_environment, char *_name, VariableType _type, int _value)
Variable * variable_temporary(Environment *_environment, VariableType _type, char *_meaning)
Define a temporary variable.
Variable * tile_at(Environment *_environment, char *_x, char *_y)
Emit code for TILE AT.
Definition tile_at.c:53
char * realName
Definition ugbc.h:982
struct _Variable Variable
Structure of a single variable.
struct _Environment Environment
Structure of compilation environment.
@ VT_TILE
Definition ugbc.h:504
@ VT_POSITION
Definition ugbc.h:468
void vic2_tile_at(Environment *_environment, char *_x, char *_y, char *_result)
Definition vic2.c:4326