mirror of https://github.com/axmolengine/axmol.git
119 lines
4.1 KiB
C
119 lines
4.1 KiB
C
/* 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 "chipmunk/chipmunk.h"
|
|
#include "ChipmunkDemo.h"
|
|
|
|
enum CollisionTypes
|
|
{
|
|
COLLISION_TYPE_ONE_WAY = 1,
|
|
};
|
|
|
|
typedef struct OneWayPlatform
|
|
{
|
|
cpVect n; // direction objects may pass through
|
|
} OneWayPlatform;
|
|
|
|
static OneWayPlatform platformInstance;
|
|
|
|
static cpBool PreSolve(cpArbiter* arb, cpSpace* space, void* ignore)
|
|
{
|
|
CP_ARBITER_GET_SHAPES(arb, a, b);
|
|
OneWayPlatform* platform = (OneWayPlatform*)cpShapeGetUserData(a);
|
|
|
|
if (cpvdot(cpArbiterGetNormal(arb), platform->n) < 0)
|
|
{
|
|
return cpArbiterIgnore(arb);
|
|
}
|
|
|
|
return cpTrue;
|
|
}
|
|
|
|
static void update(cpSpace* space, double dt)
|
|
{
|
|
cpSpaceStep(space, dt);
|
|
}
|
|
|
|
static cpSpace* init(void)
|
|
{
|
|
ChipmunkDemoMessageString = "One way platforms are trivial in Chipmunk using a very simple collision callback.";
|
|
|
|
cpSpace* space = cpSpaceNew();
|
|
cpSpaceSetIterations(space, 10);
|
|
cpSpaceSetGravity(space, cpv(0, -100));
|
|
|
|
cpBody *body, *staticBody = cpSpaceGetStaticBody(space);
|
|
cpShape* shape;
|
|
|
|
// Create segments around the edge of the screen.
|
|
shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(-320, -240), cpv(-320, 240), 0.0f));
|
|
cpShapeSetElasticity(shape, 1.0f);
|
|
cpShapeSetFriction(shape, 1.0f);
|
|
cpShapeSetFilter(shape, NOT_GRABBABLE_FILTER);
|
|
|
|
shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(320, -240), cpv(320, 240), 0.0f));
|
|
cpShapeSetElasticity(shape, 1.0f);
|
|
cpShapeSetFriction(shape, 1.0f);
|
|
cpShapeSetFilter(shape, NOT_GRABBABLE_FILTER);
|
|
|
|
shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(-320, -240), cpv(320, -240), 0.0f));
|
|
cpShapeSetElasticity(shape, 1.0f);
|
|
cpShapeSetFriction(shape, 1.0f);
|
|
cpShapeSetFilter(shape, NOT_GRABBABLE_FILTER);
|
|
|
|
// Add our one way segment
|
|
shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(-160, -100), cpv(160, -100), 10.0f));
|
|
cpShapeSetElasticity(shape, 1.0f);
|
|
cpShapeSetFriction(shape, 1.0f);
|
|
cpShapeSetCollisionType(shape, COLLISION_TYPE_ONE_WAY);
|
|
cpShapeSetFilter(shape, NOT_GRABBABLE_FILTER);
|
|
|
|
// We'll use the data pointer for the OneWayPlatform struct
|
|
platformInstance.n = cpv(0, 1); // let objects pass upwards
|
|
cpShapeSetUserData(shape, &platformInstance);
|
|
|
|
// Add a ball to test it out
|
|
cpFloat radius = 15.0f;
|
|
body = cpSpaceAddBody(space, cpBodyNew(10.0f, cpMomentForCircle(10.0f, 0.0f, radius, cpvzero)));
|
|
cpBodySetPosition(body, cpv(0, -200));
|
|
cpBodySetVelocity(body, cpv(0, 170));
|
|
|
|
shape = cpSpaceAddShape(space, cpCircleShapeNew(body, radius, cpvzero));
|
|
cpShapeSetElasticity(shape, 0.0f);
|
|
cpShapeSetFriction(shape, 0.9f);
|
|
cpShapeSetCollisionType(shape, 2);
|
|
|
|
cpCollisionHandler* handler = cpSpaceAddWildcardHandler(space, COLLISION_TYPE_ONE_WAY);
|
|
handler->preSolveFunc = PreSolve;
|
|
|
|
return space;
|
|
}
|
|
|
|
static void destroy(cpSpace* space)
|
|
{
|
|
ChipmunkDemoFreeSpaceChildren(space);
|
|
cpSpaceFree(space);
|
|
}
|
|
|
|
ChipmunkDemo OneWay = {
|
|
"One Way Platforms", 1.0 / 60.0, init, update, ChipmunkDemoDefaultDrawImpl, destroy,
|
|
};
|