animate.c

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/*****************************************************************************
 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers        *
 *****************************************************************************
 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *----------------------------------------------------------------------------
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 * (la "Licenza"); è proibito usare questo file se non in conformità alla
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 * Se non richiesto dalla legislazione vigente o concordato per iscritto,
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/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/

/* <usermanual>
@keyword ANIMATE
 
@english
 
The ''ANIMATE'' command allows you to activate a specific animation at the current 
position, or at one indicated in the command. If an animation is already active, 
it will be abruptly interrupted and the indicated one will be started
 
@italian
 
Il comando ''ANIMATE'' permette di attivare una specifica animazione nella posizione 
attuale, oppure in una indicata nel comando. Se è già attiva una animazione, la stessa 
sarà interrotta bruscamente e sarà fatta partire quella indicata.
 
@syntax ANIMATE prefix WITH anim [AT x, y]
 
@example flyingAirplane := LOAD ATLAS("airplane.png") FRAME SIZE (16, 16)
@example ANIMATION BOUNCE anim WITH flyingAirplane USING airplane
@example ANIMATE airplane WITH anim AT 20, 20
@example DO: RUN PARALLEL: LOOP
 
@target all
</usermanual> */
void animate_semivars( Environment * _environment, char * _prefix, char * _anim, char * _x, char * _y ) {
 
#if defined(__gb__)
    return;
#endif
 
    char prefixAnimation[MAX_TEMPORARY_STORAGE]; sprintf( prefixAnimation, "%sAnimation", _prefix );
 
    if ( ! variable_exists( _environment, prefixAnimation ) ) {
        CRITICAL_CANNOT_USE_ANIMATE_WITHOUT_ANIMATION(_prefix);
    }
 
    Variable * prefixAnimationVar = variable_retrieve( _environment, prefixAnimation );
 
    if ( prefixAnimationVar->type != VT_THREAD ) {
        CRITICAL_CANNOT_USE_ANIMATE_WITHOUT_ANIMATION(_prefix);
    }
 
    if ( _x ) {
        Variable * x = variable_retrieve_or_define( _environment, _x, VT_POSITION, 0 );
        char prefixX[MAX_TEMPORARY_STORAGE]; sprintf( prefixX, "%sX", _prefix );
        Variable * prefixXVar = variable_retrieve( _environment, prefixX );
        variable_move( _environment, x->name, prefixXVar->name );
    }
 
    if ( _y ) {
        Variable * y = variable_retrieve_or_define( _environment, _y, VT_POSITION, 0 );
        char prefixY[MAX_TEMPORARY_STORAGE]; sprintf( prefixY, "%sY", _prefix );
        Variable * prefixYVar = variable_retrieve( _environment, prefixY );
        variable_move( _environment, y->name, prefixYVar->name );
    }
 
    MAKE_LABEL
 
    char skipKillLabel[MAX_TEMPORARY_STORAGE]; sprintf( skipKillLabel, "%sskip", label );
    cpu_compare_and_branch_8bit_const( _environment, prefixAnimationVar->realName, 0xff, skipKillLabel, 1 );
 
    // KILL playerAnimation
    kill_procedure( _environment, prefixAnimationVar->name );
 
    cpu_label( _environment, skipKillLabel );
 
    // playerAnimation = SPAWN animPlayerPunch
    variable_move( _environment, spawn_procedure( _environment, _anim, 0 )->name, prefixAnimationVar->name );
 
    run_parallel( _environment );
 
}