mirror of https://github.com/axmolengine/axmol.git
153 lines
4.2 KiB
C
153 lines
4.2 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 <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include "chipmunk.h"
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#include "drawSpace.h"
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#include "ChipmunkDemo.h"
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static cpSpace *space;
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static cpBody *staticBody;
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typedef struct OneWayPlatform {
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cpVect n; // direction objects may pass through
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cpArray *passThruList; // list of objects passing through
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} OneWayPlatform;
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static OneWayPlatform platformInstance;
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static int
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preSolve(cpArbiter *arb, cpSpace *space, void *ignore)
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{
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CP_ARBITER_GET_SHAPES(arb, a, b);
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OneWayPlatform *platform = (OneWayPlatform*)(a->data);
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if(cpArrayContains(platform->passThruList, b)){
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// The object is in the pass thru list, ignore it until separates.
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return 0;
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} else {
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cpFloat dot = cpvdot(cpArbiterGetNormal(arb, 0), platform->n);
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if(dot < 0){
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// Add the object to the pass thrru list
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cpArrayPush(platform->passThruList, b);
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return 0;
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} else {
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return 1;
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}
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}
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}
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static void
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separate(cpArbiter *arb, cpSpace *space, void *ignore)
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{
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CP_ARBITER_GET_SHAPES(arb, a, b);
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// remove the object from the pass thru list
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cpArrayDeleteObj(((OneWayPlatform *)a->data)->passThruList, b);
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}
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static void
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update(int ticks)
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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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static cpSpace *
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init(void)
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{
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staticBody = cpBodyNew(INFINITY, INFINITY);
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cpResetShapeIdCounter();
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space = cpSpaceNew();
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space->iterations = 10;
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space->gravity = cpv(0, -100);
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cpBody *body;
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cpShape *shape;
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// Create segments around the edge of the screen.
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shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(-320,240), 0.0f));
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shape->e = 1.0f; shape->u = 1.0f;
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shape->layers = NOT_GRABABLE_MASK;
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shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(320,-240), cpv(320,240), 0.0f));
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shape->e = 1.0f; shape->u = 1.0f;
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shape->layers = NOT_GRABABLE_MASK;
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shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(320,-240), 0.0f));
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shape->e = 1.0f; shape->u = 1.0f;
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shape->layers = NOT_GRABABLE_MASK;
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// Add our one way segment
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shape = cpSpaceAddStaticShape(space, cpSegmentShapeNew(staticBody, cpv(-160,-100), cpv(160,-100), 10.0f));
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shape->e = 1.0f; shape->u = 1.0f;
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shape->collision_type = 1;
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shape->layers = NOT_GRABABLE_MASK;
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// We'll use the data pointer for the OneWayPlatform struct
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platformInstance.n = cpv(0, 1); // let objects pass upwards
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platformInstance.passThruList = cpArrayNew(0);
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shape->data = &platformInstance;
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// Add a ball to make things more interesting
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cpFloat radius = 15.0f;
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body = cpSpaceAddBody(space, cpBodyNew(10.0f, cpMomentForCircle(10.0f, 0.0f, radius, cpvzero)));
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body->p = cpv(0, -200);
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body->v = cpv(0, 170);
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shape = cpSpaceAddShape(space, cpCircleShapeNew(body, radius, cpvzero));
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shape->e = 0.0f; shape->u = 0.9f;
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shape->collision_type = 2;
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cpSpaceAddCollisionHandler(space, 1, 2, NULL, preSolve, NULL, separate, NULL);
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return space;
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}
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static void
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destroy(void)
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{
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cpBodyFree(staticBody);
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cpSpaceFreeChildren(space);
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cpSpaceFree(space);
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cpArrayFree(platformInstance.passThruList);
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}
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chipmunkDemo OneWay = {
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"One Way Platforms",
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NULL,
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init,
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update,
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destroy,
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};
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