mirror of
https://github.com/GRRLIB/GRRLIB.git
synced 2024-11-10 10:22:20 +00:00
287 lines
8.3 KiB
C++
287 lines
8.3 KiB
C++
/*===========================================
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GRRLIB (GX Version)
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Example code by Xane
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This example shows a basic particle
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engine creating a Smokebomb.
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============================================*/
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#include <grrlib.h>
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#include <stdlib.h>
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#include <wiiuse/wpad.h>
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#include <math.h>
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#include <ogc/lwp_watchdog.h>
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#include <vector>
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// Include Graphics
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#include "GFX/RGFX_Background.h"
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#include "GFX/RGFX_Crosshair.h"
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#include "GFX/RGFX_Smoke.h"
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#include "GFX/RGFX_Font.h"
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// Define Effects
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#define EFFECT_SMOKEBOMB 1
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// Random Number (0 - 1) in float
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#define RANDOM ((((float)(rand() % 12))/12)-0.5)
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using std::vector;
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Mtx GXmodelView2D;
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// Basic structure to hold particle data
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typedef struct Particle {
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u8 id;
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float x, y;
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float sx, sy;
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u16 rot;
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u8 frame, framecnt, framedelay;
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u8 red, green, blue;
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float scale, alpha;
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float sscale, salpha;
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float scolor;
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GRRLIB_texImg *tex;
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} Particle;
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// Vector used as a container to iterate through all members of GRRLIB_texImg
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static vector<GRRLIB_texImg *> TextureList;
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static vector<Particle *> ParticleList;
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static vector<Particle *> ParticleListTmp;
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// Declare static functions
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static void ExitGame();
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static void createEffect( u8 id, int _x, int _y );
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static void createParticle( u8 _id, int _x, int _y, float _scale, float _alpha, u8 _red, u8 _green, u8 _blue );
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static bool updateParticle( Particle *part );
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static u8 CalculateFrameRate();
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// Initialize general variables
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extern GXRModeObj *rmode;
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ir_t P1Mote;
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short WinW;
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short WinH;
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int P1MX, P1MY;
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// Prepare Graphics
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GRRLIB_texImg *GFX_Background;
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GRRLIB_texImg *GFX_Crosshair;
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GRRLIB_texImg *GFX_Smoke;
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GRRLIB_texImg *GFX_Font;
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int main() {
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u32 WPADKeyDown;
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u32 WPADKeyHeld;
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u8 FPS = 0;
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u32 ParticleCnt = 0;
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// Init GRRLIB & WiiUse
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GRRLIB_Init();
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WinW = rmode->fbWidth;
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WinH = rmode->efbHeight;
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WPAD_Init();
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WPAD_SetIdleTimeout( 60*10 );
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WPAD_SetDataFormat( WPAD_CHAN_0, WPAD_FMT_BTNS_ACC_IR );
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// Load textures
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GFX_Background = GRRLIB_LoadTextureJPG(RGFX_Background);
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GFX_Crosshair = GRRLIB_LoadTexturePNG(RGFX_Crosshair);
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GFX_Smoke = GRRLIB_LoadTexturePNG(RGFX_Smoke);
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GFX_Font = GRRLIB_LoadTexturePNG(RGFX_Font);
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GRRLIB_InitTileSet( GFX_Font, 8, 16, 32 );
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// Set handles
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GRRLIB_SetMidHandle( GFX_Crosshair, true );
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GRRLIB_SetMidHandle( GFX_Smoke, true );
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// Feed the vector with the textures
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TextureList.push_back( GFX_Background );
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TextureList.push_back( GFX_Crosshair );
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TextureList.push_back( GFX_Smoke );
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TextureList.push_back( GFX_Font );
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while (true) {
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WPAD_ScanPads();
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WPADKeyDown = WPAD_ButtonsDown(WPAD_CHAN_0);
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WPADKeyHeld = WPAD_ButtonsHeld(WPAD_CHAN_0);
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WPAD_SetVRes(WPAD_CHAN_0, WinW, WinH);
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WPAD_IR(WPAD_CHAN_0, &P1Mote);
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// Resetting Vars
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GRRLIB_SetBlend( GRRLIB_BLEND_ALPHA );
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ParticleCnt = 0;
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// WiiMote IR Viewport correction
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P1MX = P1Mote.sx - 150;
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P1MY = P1Mote.sy - 150;
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// Drawing Background
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GRRLIB_DrawImg( 0, 0, GFX_Background, 0, 1, 1, RGBA(255, 255, 255, 255) );
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// Add any pending objects into the main container
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if (ParticleListTmp.size()) {
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for(u32 i = 0; i<ParticleListTmp.size();i++) {
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ParticleList.push_back(ParticleListTmp[i]);
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}
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ParticleListTmp.clear();
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}
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// Update and draw all particles
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for (vector<Particle *>::iterator PartIter = ParticleList.begin(); PartIter != ParticleList.end();) {
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if (updateParticle((*PartIter)) == true) {
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GRRLIB_DrawImg( (*PartIter)->x, (*PartIter)->y, (*PartIter)->tex, (*PartIter)->rot, (*PartIter)->scale, (*PartIter)->scale, RGBA( (*PartIter)->red, (*PartIter)->green, (*PartIter)->blue, GRRLIB_ClampVar8((*PartIter)->alpha*255) ) );
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} else {
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free( (*PartIter) );
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ParticleList.erase(PartIter);
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continue;
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}
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ParticleCnt += 1;
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PartIter++;
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}
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// Draw Crosshair
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GRRLIB_DrawImg( P1MX, P1MY, GFX_Crosshair, 0, 1, 1, RGBA(255, 255, 255, 255) );
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// Draw Text
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GRRLIB_Rectangle( 28, 28, 280, 20, RGBA(0, 0, 0, 160), 1 );
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GRRLIB_Printf ( 32, 32, GFX_Font, 0xFFFFFFFF, 1, "Point your WiiMote on the screen." );
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GRRLIB_Rectangle( 28, 48, 200, 16, RGBA(0, 0, 0, 160), 1 );
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GRRLIB_Printf ( 32, 48, GFX_Font, 0xFFFFFFFF, 1, "Number of Particle: %d", ParticleCnt );
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GRRLIB_Rectangle( 28, 64, 64, 16, RGBA(0, 0, 0, 160), 1 );
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GRRLIB_Printf ( 32, 64, GFX_Font, 0xFFFFFFFF, 1, "FPS: %d", FPS );
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// Renders the Scene
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GRRLIB_Render();
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FPS = CalculateFrameRate();
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if (WPADKeyDown & WPAD_BUTTON_B) {
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createEffect( EFFECT_SMOKEBOMB, P1MX, P1MY );
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}
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if (WPADKeyDown & WPAD_BUTTON_HOME) {
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ExitGame();
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}
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}
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ExitGame();
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return 0;
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}
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static void createEffect( u8 id, int _x, int _y ) {
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u8 _ColorAdd = 0;
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switch (id) {
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case EFFECT_SMOKEBOMB:
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for (u8 i = 0; i < 5; i++) {
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createParticle( 1, (_x + (RANDOM * 10)), (_y + (RANDOM * 10)), (1.4f+(RANDOM*0.20)), 1.0f, 64, 64, 64 );
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}
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for (u8 i = 0; i < 20; i++) {
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createParticle( 3, (_x + (RANDOM * 50)), (_y + (RANDOM * 50)), 1.25f, 1.5f, 92, 92, 92 );
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}
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for (u8 i = 0; i < 5; i++) {
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_ColorAdd = (RANDOM*75);
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createParticle( 2, (_x + (RANDOM * 40)), (_y + (RANDOM * 40)), (1.0f+(RANDOM*0.20)), 1.0f, 128+_ColorAdd, 128+_ColorAdd, 128+_ColorAdd );
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}
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break;
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}
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}
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static void createParticle( u8 _id, int _x, int _y, float _scale, float _alpha, u8 _red, u8 _green, u8 _blue ) {
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Particle *part = (struct Particle *)calloc(1, sizeof(Particle));
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part->id = _id;
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part->x = _x;
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part->y = _y;
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part->rot = rand() % 360;
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part->red = _red;
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part->green = _green;
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part->blue = _blue;
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part->scale = _scale;
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part->alpha = _alpha;
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part->tex = GFX_Smoke;
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part->sy = RANDOM;
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part->sx = RANDOM;
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part->sscale = 0.9985;
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part->salpha = 0.985;
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switch (part->id) {
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case 1:
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part->sy = RANDOM * 0.5;
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part->sx = RANDOM * 0.5;
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part->sscale = 0.999;
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part->salpha = 0.992;
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part->framedelay = 10;
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part->framecnt = 2;
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break;
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case 2:
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part->scolor = 0.98;
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part->salpha = 0.95;
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break;
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case 3:
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part->sy = (RANDOM * 8);
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part->sx = (RANDOM * 8);
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part->salpha = 0.85;
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part->scolor = 0.95;
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break;
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}
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ParticleListTmp.push_back( part );
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}
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static bool updateParticle( Particle *part ) {
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if (part->alpha < 0.05) { part->alpha -= 0.001; }
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if (part->alpha < 0.1) { part->alpha -= 0.001; }
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part->x += part->sx;
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part->y += part->sy;
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part->scale *= part->sscale;
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part->alpha *= part->salpha;
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switch (part->id) {
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case 1:
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if (part->alpha < 0.25) { part->alpha -= 0.001; }
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if (part->framecnt == 0) {
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part->framecnt = 20;
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part->red -= 1;
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part->green -= 1;
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part->blue -= 1;
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}
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part->framecnt -= 1;
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break;
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case 2:
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case 3:
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part->red *= part->scolor;
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part->green *= part->scolor;
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part->blue *= part->scolor;
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break;
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}
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if ((part->scale < 0) || (part->alpha < 0)) { return false; }
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return true;
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}
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static void ExitGame() {
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// Deinitialize GRRLIB & Video
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GRRLIB_Exit();
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// Free all memory used by textures.
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for (vector<GRRLIB_texImg *>::iterator TexIter = TextureList.begin(); TexIter != TextureList.end(); TexIter++) {
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free((*TexIter)->data);
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free((*TexIter));
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}
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TextureList.clear();
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// Exit application
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exit(0);
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}
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static u8 CalculateFrameRate() {
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static u8 frameCount = 0;
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static u32 lastTime;
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static u8 FPS = 0;
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u32 currentTime = ticks_to_millisecs(gettime());
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frameCount++;
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if(currentTime - lastTime > 1000) {
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lastTime = currentTime;
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FPS = frameCount;
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frameCount = 0;
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}
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return FPS;
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}
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