mirror of https://github.com/axmolengine/axmol.git
320 lines
17 KiB
C
320 lines
17 KiB
C
/* Copyright (c) 2013 Scott Lembcke and Howling Moon Software
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/// @defgroup cpSpace cpSpace
|
|
/// @{
|
|
|
|
//MARK: Definitions
|
|
|
|
/// Collision begin event function callback type.
|
|
/// Returning false from a begin callback causes the collision to be ignored until
|
|
/// the the separate callback is called when the objects stop colliding.
|
|
typedef cpBool (*cpCollisionBeginFunc)(cpArbiter *arb, cpSpace *space, cpDataPointer userData);
|
|
/// Collision pre-solve event function callback type.
|
|
/// Returning false from a pre-step callback causes the collision to be ignored until the next step.
|
|
typedef cpBool (*cpCollisionPreSolveFunc)(cpArbiter *arb, cpSpace *space, cpDataPointer userData);
|
|
/// Collision post-solve event function callback type.
|
|
typedef void (*cpCollisionPostSolveFunc)(cpArbiter *arb, cpSpace *space, cpDataPointer userData);
|
|
/// Collision separate event function callback type.
|
|
typedef void (*cpCollisionSeparateFunc)(cpArbiter *arb, cpSpace *space, cpDataPointer userData);
|
|
|
|
/// Struct that holds function callback pointers to configure custom collision handling.
|
|
/// Collision handlers have a pair of types; when a collision occurs between two shapes that have these types, the collision handler functions are triggered.
|
|
struct cpCollisionHandler {
|
|
/// Collision type identifier of the first shape that this handler recognizes.
|
|
/// In the collision handler callback, the shape with this type will be the first argument. Read only.
|
|
const cpCollisionType typeA;
|
|
/// Collision type identifier of the second shape that this handler recognizes.
|
|
/// In the collision handler callback, the shape with this type will be the second argument. Read only.
|
|
const cpCollisionType typeB;
|
|
/// This function is called when two shapes with types that match this collision handler begin colliding.
|
|
cpCollisionBeginFunc beginFunc;
|
|
/// This function is called each step when two shapes with types that match this collision handler are colliding.
|
|
/// It's called before the collision solver runs so that you can affect a collision's outcome.
|
|
cpCollisionPreSolveFunc preSolveFunc;
|
|
/// This function is called each step when two shapes with types that match this collision handler are colliding.
|
|
/// It's called after the collision solver runs so that you can read back information about the collision to trigger events in your game.
|
|
cpCollisionPostSolveFunc postSolveFunc;
|
|
/// This function is called when two shapes with types that match this collision handler stop colliding.
|
|
cpCollisionSeparateFunc separateFunc;
|
|
/// This is a user definable context pointer that is passed to all of the collision handler functions.
|
|
cpDataPointer userData;
|
|
};
|
|
|
|
// TODO: Make timestep a parameter?
|
|
|
|
|
|
//MARK: Memory and Initialization
|
|
|
|
/// Allocate a cpSpace.
|
|
CP_EXPORT cpSpace* cpSpaceAlloc(void);
|
|
/// Initialize a cpSpace.
|
|
CP_EXPORT cpSpace* cpSpaceInit(cpSpace *space);
|
|
/// Allocate and initialize a cpSpace.
|
|
CP_EXPORT cpSpace* cpSpaceNew(void);
|
|
|
|
/// Destroy a cpSpace.
|
|
CP_EXPORT void cpSpaceDestroy(cpSpace *space);
|
|
/// Destroy and free a cpSpace.
|
|
CP_EXPORT void cpSpaceFree(cpSpace *space);
|
|
|
|
|
|
//MARK: Properties
|
|
|
|
/// Number of iterations to use in the impulse solver to solve contacts and other constraints.
|
|
CP_EXPORT int cpSpaceGetIterations(const cpSpace *space);
|
|
CP_EXPORT void cpSpaceSetIterations(cpSpace *space, int iterations);
|
|
|
|
/// Gravity to pass to rigid bodies when integrating velocity.
|
|
CP_EXPORT cpVect cpSpaceGetGravity(const cpSpace *space);
|
|
CP_EXPORT void cpSpaceSetGravity(cpSpace *space, cpVect gravity);
|
|
|
|
/// Damping rate expressed as the fraction of velocity bodies retain each second.
|
|
/// A value of 0.9 would mean that each body's velocity will drop 10% per second.
|
|
/// The default value is 1.0, meaning no damping is applied.
|
|
/// @note This damping value is different than those of cpDampedSpring and cpDampedRotarySpring.
|
|
CP_EXPORT cpFloat cpSpaceGetDamping(const cpSpace *space);
|
|
CP_EXPORT void cpSpaceSetDamping(cpSpace *space, cpFloat damping);
|
|
|
|
/// Speed threshold for a body to be considered idle.
|
|
/// The default value of 0 means to let the space guess a good threshold based on gravity.
|
|
CP_EXPORT cpFloat cpSpaceGetIdleSpeedThreshold(const cpSpace *space);
|
|
CP_EXPORT void cpSpaceSetIdleSpeedThreshold(cpSpace *space, cpFloat idleSpeedThreshold);
|
|
|
|
/// Time a group of bodies must remain idle in order to fall asleep.
|
|
/// Enabling sleeping also implicitly enables the the contact graph.
|
|
/// The default value of INFINITY disables the sleeping algorithm.
|
|
CP_EXPORT cpFloat cpSpaceGetSleepTimeThreshold(const cpSpace *space);
|
|
CP_EXPORT void cpSpaceSetSleepTimeThreshold(cpSpace *space, cpFloat sleepTimeThreshold);
|
|
|
|
/// Amount of encouraged penetration between colliding shapes.
|
|
/// Used to reduce oscillating contacts and keep the collision cache warm.
|
|
/// Defaults to 0.1. If you have poor simulation quality,
|
|
/// increase this number as much as possible without allowing visible amounts of overlap.
|
|
CP_EXPORT cpFloat cpSpaceGetCollisionSlop(const cpSpace *space);
|
|
CP_EXPORT void cpSpaceSetCollisionSlop(cpSpace *space, cpFloat collisionSlop);
|
|
|
|
/// Determines how fast overlapping shapes are pushed apart.
|
|
/// Expressed as a fraction of the error remaining after each second.
|
|
/// Defaults to pow(1.0 - 0.1, 60.0) meaning that Chipmunk fixes 10% of overlap each frame at 60Hz.
|
|
CP_EXPORT cpFloat cpSpaceGetCollisionBias(const cpSpace *space);
|
|
CP_EXPORT void cpSpaceSetCollisionBias(cpSpace *space, cpFloat collisionBias);
|
|
|
|
/// Number of frames that contact information should persist.
|
|
/// Defaults to 3. There is probably never a reason to change this value.
|
|
CP_EXPORT cpTimestamp cpSpaceGetCollisionPersistence(const cpSpace *space);
|
|
CP_EXPORT void cpSpaceSetCollisionPersistence(cpSpace *space, cpTimestamp collisionPersistence);
|
|
|
|
/// User definable data pointer.
|
|
/// Generally this points to your game's controller or game state
|
|
/// class so you can access it when given a cpSpace reference in a callback.
|
|
CP_EXPORT cpDataPointer cpSpaceGetUserData(const cpSpace *space);
|
|
CP_EXPORT void cpSpaceSetUserData(cpSpace *space, cpDataPointer userData);
|
|
|
|
/// The Space provided static body for a given cpSpace.
|
|
/// This is merely provided for convenience and you are not required to use it.
|
|
CP_EXPORT cpBody* cpSpaceGetStaticBody(const cpSpace *space);
|
|
|
|
/// Returns the current (or most recent) time step used with the given space.
|
|
/// Useful from callbacks if your time step is not a compile-time global.
|
|
CP_EXPORT cpFloat cpSpaceGetCurrentTimeStep(const cpSpace *space);
|
|
|
|
/// returns true from inside a callback when objects cannot be added/removed.
|
|
CP_EXPORT cpBool cpSpaceIsLocked(cpSpace *space);
|
|
|
|
|
|
//MARK: Collision Handlers
|
|
|
|
/// Create or return the existing collision handler that is called for all collisions that are not handled by a more specific collision handler.
|
|
CP_EXPORT cpCollisionHandler *cpSpaceAddDefaultCollisionHandler(cpSpace *space);
|
|
/// Create or return the existing collision handler for the specified pair of collision types.
|
|
/// If wildcard handlers are used with either of the collision types, it's the responibility of the custom handler to invoke the wildcard handlers.
|
|
CP_EXPORT cpCollisionHandler *cpSpaceAddCollisionHandler(cpSpace *space, cpCollisionType a, cpCollisionType b);
|
|
/// Create or return the existing wildcard collision handler for the specified type.
|
|
CP_EXPORT cpCollisionHandler *cpSpaceAddWildcardHandler(cpSpace *space, cpCollisionType type);
|
|
|
|
|
|
//MARK: Add/Remove objects
|
|
|
|
/// Add a collision shape to the simulation.
|
|
/// If the shape is attached to a static body, it will be added as a static shape.
|
|
CP_EXPORT cpShape* cpSpaceAddShape(cpSpace *space, cpShape *shape);
|
|
/// Add a rigid body to the simulation.
|
|
CP_EXPORT cpBody* cpSpaceAddBody(cpSpace *space, cpBody *body);
|
|
/// Add a constraint to the simulation.
|
|
CP_EXPORT cpConstraint* cpSpaceAddConstraint(cpSpace *space, cpConstraint *constraint);
|
|
|
|
/// Remove a collision shape from the simulation.
|
|
CP_EXPORT void cpSpaceRemoveShape(cpSpace *space, cpShape *shape);
|
|
/// Remove a rigid body from the simulation.
|
|
CP_EXPORT void cpSpaceRemoveBody(cpSpace *space, cpBody *body);
|
|
/// Remove a constraint from the simulation.
|
|
CP_EXPORT void cpSpaceRemoveConstraint(cpSpace *space, cpConstraint *constraint);
|
|
|
|
/// Test if a collision shape has been added to the space.
|
|
CP_EXPORT cpBool cpSpaceContainsShape(cpSpace *space, cpShape *shape);
|
|
/// Test if a rigid body has been added to the space.
|
|
CP_EXPORT cpBool cpSpaceContainsBody(cpSpace *space, cpBody *body);
|
|
/// Test if a constraint has been added to the space.
|
|
CP_EXPORT cpBool cpSpaceContainsConstraint(cpSpace *space, cpConstraint *constraint);
|
|
|
|
//MARK: Post-Step Callbacks
|
|
|
|
/// Post Step callback function type.
|
|
typedef void (*cpPostStepFunc)(cpSpace *space, void *key, void *data);
|
|
/// Schedule a post-step callback to be called when cpSpaceStep() finishes.
|
|
/// You can only register one callback per unique value for @c key.
|
|
/// Returns true only if @c key has never been scheduled before.
|
|
/// It's possible to pass @c NULL for @c func if you only want to mark @c key as being used.
|
|
CP_EXPORT cpBool cpSpaceAddPostStepCallback(cpSpace *space, cpPostStepFunc func, void *key, void *data);
|
|
|
|
|
|
//MARK: Queries
|
|
|
|
// TODO: Queries and iterators should take a cpSpace parametery.
|
|
// TODO: They should also be abortable.
|
|
|
|
/// Nearest point query callback function type.
|
|
typedef void (*cpSpacePointQueryFunc)(cpShape *shape, cpVect point, cpFloat distance, cpVect gradient, void *data);
|
|
/// Query the space at a point and call @c func for each shape found.
|
|
CP_EXPORT void cpSpacePointQuery(cpSpace *space, cpVect point, cpFloat maxDistance, cpShapeFilter filter, cpSpacePointQueryFunc func, void *data);
|
|
/// Query the space at a point and return the nearest shape found. Returns NULL if no shapes were found.
|
|
CP_EXPORT cpShape *cpSpacePointQueryNearest(cpSpace *space, cpVect point, cpFloat maxDistance, cpShapeFilter filter, cpPointQueryInfo *out);
|
|
|
|
/// Segment query callback function type.
|
|
typedef void (*cpSpaceSegmentQueryFunc)(cpShape *shape, cpVect point, cpVect normal, cpFloat alpha, void *data);
|
|
/// Perform a directed line segment query (like a raycast) against the space calling @c func for each shape intersected.
|
|
CP_EXPORT void cpSpaceSegmentQuery(cpSpace *space, cpVect start, cpVect end, cpFloat radius, cpShapeFilter filter, cpSpaceSegmentQueryFunc func, void *data);
|
|
/// Perform a directed line segment query (like a raycast) against the space and return the first shape hit. Returns NULL if no shapes were hit.
|
|
CP_EXPORT cpShape *cpSpaceSegmentQueryFirst(cpSpace *space, cpVect start, cpVect end, cpFloat radius, cpShapeFilter filter, cpSegmentQueryInfo *out);
|
|
|
|
/// Rectangle Query callback function type.
|
|
typedef void (*cpSpaceBBQueryFunc)(cpShape *shape, void *data);
|
|
/// Perform a fast rectangle query on the space calling @c func for each shape found.
|
|
/// Only the shape's bounding boxes are checked for overlap, not their full shape.
|
|
CP_EXPORT void cpSpaceBBQuery(cpSpace *space, cpBB bb, cpShapeFilter filter, cpSpaceBBQueryFunc func, void *data);
|
|
|
|
/// Shape query callback function type.
|
|
typedef void (*cpSpaceShapeQueryFunc)(cpShape *shape, cpContactPointSet *points, void *data);
|
|
/// Query a space for any shapes overlapping the given shape and call @c func for each shape found.
|
|
CP_EXPORT cpBool cpSpaceShapeQuery(cpSpace *space, cpShape *shape, cpSpaceShapeQueryFunc func, void *data);
|
|
|
|
|
|
//MARK: Iteration
|
|
|
|
/// Space/body iterator callback function type.
|
|
typedef void (*cpSpaceBodyIteratorFunc)(cpBody *body, void *data);
|
|
/// Call @c func for each body in the space.
|
|
CP_EXPORT void cpSpaceEachBody(cpSpace *space, cpSpaceBodyIteratorFunc func, void *data);
|
|
|
|
/// Space/body iterator callback function type.
|
|
typedef void (*cpSpaceShapeIteratorFunc)(cpShape *shape, void *data);
|
|
/// Call @c func for each shape in the space.
|
|
CP_EXPORT void cpSpaceEachShape(cpSpace *space, cpSpaceShapeIteratorFunc func, void *data);
|
|
|
|
/// Space/constraint iterator callback function type.
|
|
typedef void (*cpSpaceConstraintIteratorFunc)(cpConstraint *constraint, void *data);
|
|
/// Call @c func for each shape in the space.
|
|
CP_EXPORT void cpSpaceEachConstraint(cpSpace *space, cpSpaceConstraintIteratorFunc func, void *data);
|
|
|
|
|
|
//MARK: Indexing
|
|
|
|
/// Update the collision detection info for the static shapes in the space.
|
|
CP_EXPORT void cpSpaceReindexStatic(cpSpace *space);
|
|
/// Update the collision detection data for a specific shape in the space.
|
|
CP_EXPORT void cpSpaceReindexShape(cpSpace *space, cpShape *shape);
|
|
/// Update the collision detection data for all shapes attached to a body.
|
|
CP_EXPORT void cpSpaceReindexShapesForBody(cpSpace *space, cpBody *body);
|
|
|
|
/// Switch the space to use a spatial has as it's spatial index.
|
|
CP_EXPORT void cpSpaceUseSpatialHash(cpSpace *space, cpFloat dim, int count);
|
|
|
|
|
|
//MARK: Time Stepping
|
|
|
|
/// Step the space forward in time by @c dt.
|
|
CP_EXPORT void cpSpaceStep(cpSpace *space, cpFloat dt);
|
|
|
|
|
|
//MARK: Debug API
|
|
|
|
#ifndef CP_SPACE_DISABLE_DEBUG_API
|
|
|
|
/// Color type to use with the space debug drawing API.
|
|
typedef struct cpSpaceDebugColor {
|
|
float r, g, b, a;
|
|
} cpSpaceDebugColor;
|
|
|
|
/// Callback type for a function that draws a filled, stroked circle.
|
|
typedef void (*cpSpaceDebugDrawCircleImpl)(cpVect pos, cpFloat angle, cpFloat radius, cpSpaceDebugColor outlineColor, cpSpaceDebugColor fillColor, cpDataPointer data);
|
|
/// Callback type for a function that draws a line segment.
|
|
typedef void (*cpSpaceDebugDrawSegmentImpl)(cpVect a, cpVect b, cpSpaceDebugColor color, cpDataPointer data);
|
|
/// Callback type for a function that draws a thick line segment.
|
|
typedef void (*cpSpaceDebugDrawFatSegmentImpl)(cpVect a, cpVect b, cpFloat radius, cpSpaceDebugColor outlineColor, cpSpaceDebugColor fillColor, cpDataPointer data);
|
|
/// Callback type for a function that draws a convex polygon.
|
|
typedef void (*cpSpaceDebugDrawPolygonImpl)(int count, const cpVect *verts, cpFloat radius, cpSpaceDebugColor outlineColor, cpSpaceDebugColor fillColor, cpDataPointer data);
|
|
/// Callback type for a function that draws a dot.
|
|
typedef void (*cpSpaceDebugDrawDotImpl)(cpFloat size, cpVect pos, cpSpaceDebugColor color, cpDataPointer data);
|
|
/// Callback type for a function that returns a color for a given shape. This gives you an opportunity to color shapes based on how they are used in your engine.
|
|
typedef cpSpaceDebugColor (*cpSpaceDebugDrawColorForShapeImpl)(cpShape *shape, cpDataPointer data);
|
|
|
|
typedef enum cpSpaceDebugDrawFlags {
|
|
CP_SPACE_DEBUG_DRAW_SHAPES = 1<<0,
|
|
CP_SPACE_DEBUG_DRAW_CONSTRAINTS = 1<<1,
|
|
CP_SPACE_DEBUG_DRAW_COLLISION_POINTS = 1<<2,
|
|
} cpSpaceDebugDrawFlags;
|
|
|
|
/// Struct used with cpSpaceDebugDraw() containing drawing callbacks and other drawing settings.
|
|
typedef struct cpSpaceDebugDrawOptions {
|
|
/// Function that will be invoked to draw circles.
|
|
cpSpaceDebugDrawCircleImpl drawCircle;
|
|
/// Function that will be invoked to draw line segments.
|
|
cpSpaceDebugDrawSegmentImpl drawSegment;
|
|
/// Function that will be invoked to draw thick line segments.
|
|
cpSpaceDebugDrawFatSegmentImpl drawFatSegment;
|
|
/// Function that will be invoked to draw convex polygons.
|
|
cpSpaceDebugDrawPolygonImpl drawPolygon;
|
|
/// Function that will be invoked to draw dots.
|
|
cpSpaceDebugDrawDotImpl drawDot;
|
|
|
|
/// Flags that request which things to draw (collision shapes, constraints, contact points).
|
|
cpSpaceDebugDrawFlags flags;
|
|
/// Outline color passed to the drawing function.
|
|
cpSpaceDebugColor shapeOutlineColor;
|
|
/// Function that decides what fill color to draw shapes using.
|
|
cpSpaceDebugDrawColorForShapeImpl colorForShape;
|
|
/// Color passed to drawing functions for constraints.
|
|
cpSpaceDebugColor constraintColor;
|
|
/// Color passed to drawing functions for collision points.
|
|
cpSpaceDebugColor collisionPointColor;
|
|
|
|
/// User defined context pointer passed to all of the callback functions as the 'data' argument.
|
|
cpDataPointer data;
|
|
} cpSpaceDebugDrawOptions;
|
|
|
|
/// Debug draw the current state of the space using the supplied drawing options.
|
|
CP_EXPORT void cpSpaceDebugDraw(cpSpace *space, cpSpaceDebugDrawOptions *options);
|
|
|
|
#endif
|
|
|
|
/// @}
|