mirror of
https://github.com/OpenRCT2/OpenRCT2
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141 lines
4.1 KiB
C
141 lines
4.1 KiB
C
#pragma region Copyright (c) 2014-2016 OpenRCT2 Developers
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/*****************************************************************************
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
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* For more information, visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* A full copy of the GNU General Public License can be found in licence.txt
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*****************************************************************************/
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#pragma endregion
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#include "../audio/audio.h"
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#include "../util/util.h"
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#include "sprite.h"
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/**
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*
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* rct2: 0x006735A1
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*/
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void crashed_vehicle_particle_create(rct_vehicle_colour colours, int x, int y, int z)
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{
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rct_crashed_vehicle_particle *sprite = (rct_crashed_vehicle_particle*)create_sprite(2);
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if (sprite != NULL) {
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sprite->colour[0] = colours.body_colour;
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sprite->colour[1] = colours.trim_colour;
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sprite->sprite_width = 8;
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sprite->sprite_height_negative = 8;
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sprite->sprite_height_positive = 8;
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sprite->sprite_identifier = SPRITE_IDENTIFIER_MISC;
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sprite_move(x, y, z, (rct_sprite*)sprite);
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sprite->misc_identifier = SPRITE_MISC_CRASHED_VEHICLE_PARTICLE;
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sprite->frame = (util_rand() & 0xFF) * 12;
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sprite->var_24 = (util_rand() & 0x7F) + 140;
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sprite->var_2E = ((util_rand() & 0xFF) * 5) >> 8;
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sprite->acceleration_x = ((sint16)(util_rand() & 0xFFFF)) * 4;
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sprite->acceleration_y = ((sint16)(util_rand() & 0xFFFF)) * 4;
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sprite->acceleration_z = (util_rand() & 0xFFFF) * 4 + 0x10000;
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sprite->velocity_x = 0;
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sprite->velocity_y = 0;
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sprite->velocity_z = 0;
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}
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}
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/**
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*
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* rct2: 0x00673298
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*/
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void crashed_vehicle_particle_update(rct_crashed_vehicle_particle *particle)
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{
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invalidate_sprite_0((rct_sprite*)particle);
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particle->var_24--;
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if (particle->var_24 == 0) {
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sprite_remove((rct_sprite*)particle);
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return;
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}
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// Apply gravity
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particle->acceleration_z -= 5041;
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// Apply air resistance
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particle->acceleration_x -= (particle->acceleration_x / 256);
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particle->acceleration_y -= (particle->acceleration_y / 256);
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particle->acceleration_z -= (particle->acceleration_z / 256);
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// Update velocity and position
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sint32 vx = particle->velocity_x + particle->acceleration_x;
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sint32 vy = particle->velocity_y + particle->acceleration_y;
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sint32 vz = particle->velocity_z + particle->acceleration_z;
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sint16 x = particle->x + (vx >> 16);
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sint16 y = particle->y + (vy >> 16);
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sint16 z = particle->z + (vz >> 16);
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particle->velocity_x = vx & 0xFFFF;
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particle->velocity_y = vy & 0xFFFF;
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particle->velocity_z = vz & 0xFFFF;
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// Check collision with land / water
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uint32 waterLand = map_element_height(x, y);
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sint16 landZ = (waterLand & 0xFFFF);
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sint16 waterZ = (waterLand >> 16);
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if (waterZ != 0 && particle->z >= waterZ && z <= waterZ) {
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// Splash
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audio_play_sound_at_location(SOUND_WATER_2, particle->x, particle->y, waterZ);
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crash_splash_create(particle->x, particle->y, waterZ);
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sprite_remove((rct_sprite*)particle);
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return;
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}
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if (particle->z >= landZ && z <= landZ) {
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// Bounce
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particle->acceleration_z *= -1;
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z = landZ;
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}
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sprite_move(x, y, z, (rct_sprite*)particle);
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invalidate_sprite_0((rct_sprite*)particle);
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particle->frame += 85;
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if (particle->frame >= 3072) {
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particle->frame = 0;
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}
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}
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/**
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*
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* rct2: 0x00673699
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*/
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void crash_splash_create(int x, int y, int z)
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{
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rct_unk_sprite *sprite = (rct_unk_sprite*)create_sprite(2);
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if (sprite != NULL) {
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sprite->sprite_width = 33;
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sprite->sprite_height_negative = 51;
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sprite->sprite_height_positive = 16;
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sprite->sprite_identifier = SPRITE_IDENTIFIER_MISC;
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sprite_move(x, y, z + 3, (rct_sprite*)sprite);
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sprite->misc_identifier = SPRITE_MISC_CRASH_SPLASH;
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sprite->frame = 0;
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}
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}
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/**
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*
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* rct2: 0x0067339D
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*/
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void crash_splash_update(rct_crash_splash *splash)
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{
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invalidate_sprite_2((rct_sprite*)splash);
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splash->frame += 85;
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if (splash->frame >= 7168) {
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sprite_remove((rct_sprite*)splash);
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}
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}
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