mirror of https://github.com/axmolengine/axmol.git
142 lines
3.8 KiB
Plaintext
142 lines
3.8 KiB
Plaintext
/* Copyright (c) 2007 Scott Lembcke
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <string.h>
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#include "chipmunk/chipmunk_private.h"
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#include "ChipmunkDemo.h"
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static cpBool DrawContacts(cpArbiter *arb, cpSpace *space, void *data){
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cpContactPointSet set = cpArbiterGetContactPointSet(arb);
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for(int i=0; i<set.count; i++){
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cpVect p = set.points[i].point;
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ChipmunkDebugDrawDot(6.0, p, RGBAColor(1, 0, 0, 1));
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ChipmunkDebugDrawSegment(p, cpvadd(p, cpvmult(set.points[i].normal, 10.0)), RGBAColor(1, 0, 0, 1));
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}
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return cpFalse;
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// return cpTrue;
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}
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static void
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update(cpSpace *space)
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{
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int steps = 1;
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cpFloat dt = 1.0f/60.0f/(cpFloat)steps;
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for(int i=0; i<steps; i++){
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cpSpaceStep(space, dt);
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}
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}
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#define MAX(a, b) (a > b ? a : b)
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#define MIN(a, b) (a < b ? a : b)
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static cpSpace *
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init(void)
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{
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cpSpace *space = cpSpaceNew();
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cpSpaceSetIterations(space, 5);
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cpSpaceSetDamping(space, 0.1f);
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cpSpaceSetDefaultCollisionHandler(space, NULL, DrawContacts, NULL, NULL, NULL);
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{
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cpFloat mass = 1.0f;
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cpFloat length = 100.0f;
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cpVect a = cpv(-length/2.0f, 0.0f), b = cpv(length/2.0f, 0.0f);
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cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForSegment(mass, a, b)));
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cpBodySetPos(body, cpv(-160.0f, 80.0f));
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cpSpaceAddShape(space, cpSegmentShapeNew(body, a, b, 30.0f));
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}
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{
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cpFloat mass = 1.0f;
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const int NUM_VERTS = 5;
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cpVect verts[NUM_VERTS];
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for(int i=0; i<NUM_VERTS; i++){
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cpFloat angle = -2*M_PI*i/((cpFloat) NUM_VERTS);
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verts[i] = cpv(40*cos(angle), 40*sin(angle));
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}
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cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForPoly(mass, NUM_VERTS, verts, cpvzero)));
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cpBodySetPos(body, cpv(-0.0f, 80.0f));
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cpSpaceAddShape(space, cpPolyShapeNew(body, NUM_VERTS, verts, cpvzero));
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}
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{
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cpFloat mass = 1.0f;
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cpFloat r = 60.0f;
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cpBody *body = cpSpaceAddBody(space, cpBodyNew(mass, INFINITY));
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cpBodySetPos(body, cpv(160.0, 80.0f));
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cpSpaceAddShape(space, cpCircleShapeNew(body, r, cpvzero));
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}
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cpBody *staticBody = cpSpaceGetStaticBody(space);
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cpVect terrain[] = {
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cpv(-320, -200),
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cpv(-200, -100),
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cpv( 0, -200),
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cpv( 200, -100),
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cpv( 320, -200),
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};
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int terrainCount = sizeof(terrain)/sizeof(*terrain);
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for(int i=1; i<5; i++){
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cpVect v0 = terrain[MAX(i-2, 0)];
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cpVect v1 = terrain[i-1];
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cpVect v2 = terrain[i];
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cpVect v3 = terrain[MIN(i+1, terrainCount - 1)];
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cpShape *seg = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, v1, v2, 10.0));
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cpSegmentShapeSetNeighbors(seg, v0, v3);
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}
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return space;
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}
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static void
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destroy(cpSpace *space)
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{
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ChipmunkDemoFreeSpaceChildren(space);
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cpSpaceFree(space);
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}
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ChipmunkDemo Smooth = {
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"Smooth",
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1.0f/60.0f,
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init,
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update,
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ChipmunkDemoDefaultDrawImpl,
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destroy,
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};
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