?? demo3.m
字號:
/* Copyright (c) 2007 Scott Lembcke * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include <stdlib.h>#include <stdio.h>#include <math.h>#include "chipmunk.h"#define SLEEP_TICKS 16extern cpSpace *space;extern cpBody *staticBody;// Iterate over all of the bodies and reset the ones that have fallen offscreen.static voideachBody(cpBody *body, void *unused){ if(body->p.y < -260 || fabsf(body->p.x) > 340){ cpFloat x = rand()/(cpFloat)RAND_MAX*640 - 320; body->p = cpv(x, 260); }}void demo3_update(int ticks){ int steps = 1; cpFloat dt = 1.0f/60.0f/(cpFloat)steps; for(int i=0; i<steps; i++){ cpSpaceStep(space, dt); cpSpaceEachBody(space, &eachBody, NULL); }}#define NUM_VERTS 5void demo3_init(void){ staticBody = cpBodyNew(INFINITY, INFINITY); cpResetShapeIdCounter(); space = cpSpaceNew(); space->iterations = 5; space->gravity = cpv(0, -100); cpSpaceResizeStaticHash(space, 40.0f, 999); cpSpaceResizeActiveHash(space, 30.0f, 2999); cpBody *body; cpShape *shape; // Create vertexes for a pentagon shape. cpVect verts[NUM_VERTS]; for(int i=0; i<NUM_VERTS; i++){ cpFloat angle = (cpFloat) (-2*M_PI*i/((cpFloat) NUM_VERTS)); verts[i] = cpv(10*cosf(angle), 10*sinf(angle)); } // Vertexes for a triangle shape. cpVect tris[] = { cpv(-15,-15), cpv( 0, 10), cpv( 15,-15), }; // Create the static triangles. for(int i=0; i<9; i++){ for(int j=0; j<6; j++){ cpFloat stagger = (j%2)*40; cpVect offset = cpv(i*80 - 320 + stagger, j*70 - 240); shape = cpPolyShapeNew(staticBody, 3, tris, offset); shape->e = 1.0f; shape->u = 1.0f; cpSpaceAddStaticShape(space, shape); } } // Add lots of pentagons. for(int i=0; i<300; i++){ body = cpBodyNew(1.0f, cpMomentForPoly(1.0f, NUM_VERTS, verts, cpvzero)); cpFloat x = rand()/(cpFloat)RAND_MAX*640 - 320; body->p = cpv(x, 350); cpSpaceAddBody(space, body); shape = cpPolyShapeNew(body, NUM_VERTS, verts, cpvzero); shape->e = 0.0f; shape->u = 0.4f; cpSpaceAddShape(space, shape); }}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -