mirror of https://github.com/axmolengine/axmol.git
133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/* 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 "chipmunk/chipmunk.h"
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#include "ChipmunkDemo.h"
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static cpFloat pentagon_mass = 0.0f;
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static cpFloat pentagon_moment = 0.0f;
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// Iterate over all of the bodies and reset the ones that have fallen offscreen.
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static void
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eachBody(cpBody *body, void *unused)
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{
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cpVect pos = cpBodyGetPosition(body);
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if(pos.y < -260){
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cpFloat x = rand()/(cpFloat)RAND_MAX*640 - 320;
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cpBodySetPosition(body, cpv(x, 260));
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}
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}
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static void
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update(cpSpace *space, double dt)
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{
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if(ChipmunkDemoRightDown){
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ChipmunkDemoRightDown = cpFalse;
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cpShape *nearest = cpSpacePointQueryNearest(space, ChipmunkDemoMouse, 0.0, GRAB_FILTER, NULL);
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if(nearest){
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cpBody *body = cpShapeGetBody(nearest);
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if(cpBodyGetType(body) == CP_BODY_TYPE_STATIC){
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cpBodySetType(body, CP_BODY_TYPE_DYNAMIC);
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cpBodySetMass(body, pentagon_mass);
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cpBodySetMoment(body, pentagon_moment);
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} else if(cpBodyGetType(body) == CP_BODY_TYPE_DYNAMIC) {
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cpBodySetType(body, CP_BODY_TYPE_STATIC);
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}
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}
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}
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cpSpaceEachBody(space, &eachBody, NULL);
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cpSpaceStep(space, dt);
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}
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#define NUM_VERTS 5
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static cpSpace *
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init(void)
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{
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ChipmunkDemoMessageString = "Right click to make pentagons static/dynamic.";
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cpSpace *space = cpSpaceNew();
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cpSpaceSetIterations(space, 5);
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cpSpaceSetGravity(space, cpv(0, -100));
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cpBody *body, *staticBody = cpSpaceGetStaticBody(space);
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cpShape *shape;
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// Vertexes for a triangle shape.
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cpVect tris[] = {
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cpv(-15,-15),
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cpv( 0, 10),
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cpv( 15,-15),
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};
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// Create the static triangles.
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for(int i=0; i<10; i++){
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for(int j=0; j<6; j++){
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cpFloat stagger = (j%2)*40;
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cpVect offset = cpv(i*80 - 360 + stagger, j*70 - 200);
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shape = cpSpaceAddShape(space, cpPolyShapeNew(staticBody, 3, tris, cpTransformTranslate(offset), 0.0));
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cpShapeSetElasticity(shape, 1.0f);
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cpShapeSetFriction(shape, 1.0f);
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cpShapeSetFilter(shape, NOT_GRABBABLE_FILTER);
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}
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}
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// Create vertexes for a pentagon shape.
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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 = -2.0f*CP_PI*i/((cpFloat) NUM_VERTS);
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verts[i] = cpv(10*cos(angle), 10*sin(angle));
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}
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pentagon_mass = 1.0;
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pentagon_moment = cpMomentForPoly(1.0f, NUM_VERTS, verts, cpvzero, 0.0f);
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// Add lots of pentagons.
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for(int i=0; i<300; i++){
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body = cpSpaceAddBody(space, cpBodyNew(pentagon_mass, pentagon_moment));
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cpFloat x = rand()/(cpFloat)RAND_MAX*640 - 320;
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cpBodySetPosition(body, cpv(x, 350));
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shape = cpSpaceAddShape(space, cpPolyShapeNew(body, NUM_VERTS, verts, cpTransformIdentity, 0.0));
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cpShapeSetElasticity(shape, 0.0f);
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cpShapeSetFriction(shape, 0.4f);
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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 Plink = {
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"Plink",
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1.0/60.0,
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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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