?? demo2.m
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/* 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;{ int steps = 1; cpFloat dt = 1.0f/60.0f/(cpFloat)steps; for(int i=0; i<steps; i++){ cpSpaceStep(space, dt); }}void demo2_init(void){ staticBody = cpBodyNew(INFINITY, INFINITY); cpResetShapeIdCounter(); space = cpSpaceNew(); space->iterations = 20; cpSpaceResizeStaticHash(space, 40.0f, 1000); cpSpaceResizeActiveHash(space, 40.0f, 1000); space->gravity = cpv(0, -100); cpBody *body; cpShape *shape; int num = 4; cpVect verts[] = { cpv(-15,-15), cpv(-15, 15), cpv( 15, 15), cpv( 15,-15), }; // Create segments around the edge of the screen. shape = cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(-320,240), 0.0f); shape->e = 1.0f; shape->u = 1.0f; cpSpaceAddStaticShape(space, shape); shape = cpSegmentShapeNew(staticBody, cpv(320,-240), cpv(320,240), 0.0f); shape->e = 1.0f; shape->u = 1.0f; cpSpaceAddStaticShape(space, shape); shape = cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(320,-240), 0.0f); shape->e = 1.0f; shape->u = 1.0f; cpSpaceAddStaticShape(space, shape); // Add lots of boxes. for(int i=0; i<14; i++){ for(int j=0; j<=i; j++){ body = cpBodyNew(1.0f, cpMomentForPoly(1.0f, num, verts, cpvzero)); body->p = cpv(j*32 - i*16, 300 - i*32); cpSpaceAddBody(space, body); shape = cpPolyShapeNew(body, num, verts, cpvzero); shape->e = 0.0f; shape->u = 0.8f; cpSpaceAddShape(space, shape); } } // Add a ball to make things more interesting cpFloat radius = 15.0f; body = cpBodyNew(10.0f, cpMomentForCircle(10.0f, 0.0f, radius, cpvzero)); body->p = cpv(0, -240 + radius);// body->v = cpv(10, 0); cpSpaceAddBody(space, body); shape = cpCircleShapeNew(body, radius, cpvzero); shape->e = 0.0f; shape->u = 0.9f; cpSpaceAddShape(space, shape);}
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