Cocos2d-x  v4
Terrain Class Reference

Terrain Defines a Terrain that is capable of rendering large landscapes from 2D heightmap images. More...

Inherits Node.

Classes

struct  DetailMap
 DetailMap this struct maintain a detail map data ,including source file ,detail size. More...
 
struct  TerrainData
 TerrainData This TerrainData struct warp all parameter that Terrain need to create. More...
 
struct  Triangle
 Triangle. More...
 

Public Types

enum  CrackFixedType
 the crack fix type. More...
 

Public Member Functions

void setLightMap (const std::string &fileName)
 set light map texture
 
void setLightDir (const Vec3 &lightDir)
 set directional light for the terrain More...
 
bool initProperties ()
 initialize all Properties which terrain need
 
bool initHeightMap (const std::string &heightMap)
 initialize heightMap data
 
bool initTextures ()
 initialize alphaMap ,detailMaps textures
 
float getHeight (float x, float z, Vec3 *normal=nullptr) const
 get specified position's height mapping to the terrain,use bi-linear interpolation method More...
 
float getHeight (const Vec2 &pos, Vec3 *normal=nullptr) const
 get specified position's height mapping to the terrain,use bi-linear interpolation method More...
 
Vec3 getNormal (int pixelX, int pixelY) const
 get the normal of the specified position in terrain More...
 
float getImageHeight (int pixelX, int pixelY) const
 get height from the raw height filed
 
void setDrawWire (bool boolValue)
 show the wireline instead of the surface,Debug Use only. More...
 
void setLODDistance (float lod1, float lod2, float lod3)
 Set threshold distance of each LOD level,must equal or greater than the chunk size @Note when invoke initHeightMap, the LOD distance will be automatic calculated.
 
void setIsEnableFrustumCull (bool boolValue)
 Switch frustum Culling Flag @Note frustum culling will remarkable improve your terrain rendering performance.
 
void setAlphaMap (cocos2d::Texture2D *newAlphaMapTexture)
 set the alpha map
 
void setDetailMap (unsigned int index, DetailMap detailMap)
 set the Detail Map
 
virtual void draw (cocos2d::Renderer *renderer, const cocos2d::Mat4 &transform, uint32_t flags) override
 Override this method to draw your own node. More...
 
Vec3 getIntersectionPoint (const Ray &ray) const
 Ray-Terrain intersection. More...
 
bool getIntersectionPoint (const Ray &ray, Vec3 &intersectionPoint) const
 Ray-Terrain intersection. More...
 
void setMaxDetailMapAmount (int maxValue)
 set the MaxDetailAmount.
 
Vec2 convertToTerrainSpace (const Vec2 &worldSpace) const
 Convert a world Space position (X,Z) to terrain space position (X,Z)
 
void resetHeightMap (const std::string &heightMap)
 reset the heightmap data.
 
float getMinHeight ()
 get the terrain's minimal height.
 
float getMaxHeight ()
 get the terrain's maximal height.
 
AABB getAABB ()
 get the terrain's AABB(in world space)
 
void setSkirtHeightRatio (float ratio)
 set the skirt height ratio
 
QuadTree * getQuadTree ()
 get the terrain's quad tree which is also the root node.
 
Size getTerrainSize () const
 get the terrain's size
 
std::vector< float > getHeightData () const
 get the terrain's height data
 
- Public Member Functions inherited from Node
virtual bool isRunning () const
 Returns whether or not the node is "running". More...
 
void scheduleUpdateWithPriorityLua (int handler, int priority)
 Schedules for lua script. More...
 
virtual void cleanup ()
 Stops all running actions and schedulers.
 
virtual void visit (Renderer *renderer, const Mat4 &parentTransform, uint32_t parentFlags)
 Visits this node's children and draw them recursively. More...
 
virtual ScenegetScene () const
 Returns the Scene that contains the Node. More...
 
virtual Rect getBoundingBox () const
 Returns an AABB (axis-aligned bounding-box) in its parent's coordinate system. More...
 
virtual void setEventDispatcher (EventDispatcher *dispatcher)
 Set event dispatcher for scene. More...
 
virtual EventDispatchergetEventDispatcher () const
 Get the event dispatcher of scene. More...
 
virtual uint8_t getOpacity () const
 Return the node's opacity. More...
 
virtual uint8_t getDisplayedOpacity () const
 Return the node's display opacity. More...
 
virtual void setOpacity (uint8_t opacity)
 Change node opacity. More...
 
virtual void updateDisplayedOpacity (uint8_t parentOpacity)
 Update the displayed opacity of node with it's parent opacity;. More...
 
virtual bool isCascadeOpacityEnabled () const
 Whether cascadeOpacity is enabled or not. More...
 
virtual void setCascadeOpacityEnabled (bool cascadeOpacityEnabled)
 Change node's cascadeOpacity property. More...
 
virtual const Color3BgetColor () const
 Query node's color value. More...
 
virtual const Color3BgetDisplayedColor () const
 Query node's displayed color. More...
 
virtual void setColor (const Color3B &color)
 Change the color of node. More...
 
virtual void updateDisplayedColor (const Color3B &parentColor)
 Update node's displayed color with its parent color. More...
 
virtual bool isCascadeColorEnabled () const
 Query whether cascadeColor is enabled or not. More...
 
virtual void setCascadeColorEnabled (bool cascadeColorEnabled)
 If you want node's color affect the children node's color, then set it to true. More...
 
virtual void setOpacityModifyRGB (bool value)
 If you want the opacity affect the color property, then set to true. More...
 
virtual bool isOpacityModifyRGB () const
 If node opacity will modify the RGB color value, then you should override this method and return true. More...
 
void setOnEnterCallback (const std::function< void()> &callback)
 Set the callback of event onEnter. More...
 
const std::function< void()> & getOnEnterCallback () const
 Get the callback of event onEnter. More...
 
void setOnExitCallback (const std::function< void()> &callback)
 Set the callback of event onExit. More...
 
const std::function< void()> & getOnExitCallback () const
 Get the callback of event onExit. More...
 
void setOnEnterTransitionDidFinishCallback (const std::function< void()> &callback)
 Set the callback of event EnterTransitionDidFinish. More...
 
const std::function< void()> & getOnEnterTransitionDidFinishCallback () const
 Get the callback of event EnterTransitionDidFinish. More...
 
void setOnExitTransitionDidStartCallback (const std::function< void()> &callback)
 Set the callback of event ExitTransitionDidStart. More...
 
const std::function< void()> & getOnExitTransitionDidStartCallback () const
 Get the callback of event ExitTransitionDidStart. More...
 
unsigned short getCameraMask () const
 get & set camera mask, the node is visible by the camera whose camera flag & node's camera mask is true
 
virtual void setCameraMask (unsigned short mask, bool applyChildren=true)
 Modify the camera mask for current node. More...
 
virtual void setLocalZOrder (std::int32_t localZOrder)
 LocalZOrder is the 'key' used to sort the node relative to its siblings. More...
 
virtual void _setLocalZOrder (std::int32_t z)
 
void updateOrderOfArrival ()
 !!! ONLY FOR INTERNAL USE Sets the arrival order when this node has a same ZOrder with other children. More...
 
virtual std::int32_t getLocalZOrder () const
 Gets the local Z order of this node. More...
 
virtual void setGlobalZOrder (float globalZOrder)
 Defines the order in which the nodes are renderer. More...
 
virtual float getGlobalZOrder () const
 Returns the Node's Global Z Order. More...
 
virtual void setScaleX (float scaleX)
 Sets the scale (x) of the node. More...
 
virtual float getScaleX () const
 Returns the scale factor on X axis of this node. More...
 
virtual void setScaleY (float scaleY)
 Sets the scale (y) of the node. More...
 
virtual float getScaleY () const
 Returns the scale factor on Y axis of this node. More...
 
virtual void setScaleZ (float scaleZ)
 Changes the scale factor on Z axis of this node. More...
 
virtual float getScaleZ () const
 Returns the scale factor on Z axis of this node. More...
 
virtual void setScale (float scale)
 Sets the scale (x,y,z) of the node. More...
 
virtual float getScale () const
 Gets the scale factor of the node, when X and Y have the same scale factor. More...
 
virtual void setScale (float scaleX, float scaleY)
 Sets the scale (x,y) of the node. More...
 
virtual void setPosition (const Vec2 &position)
 Sets the position (x,y) of the node in its parent's coordinate system. More...
 
virtual void setPositionNormalized (const Vec2 &position)
 Sets the position (x,y) using values between 0 and 1. More...
 
virtual void setNormalizedPosition (const Vec2 &position)
 
virtual const Vec2getPosition () const
 Gets the position (x,y) of the node in its parent's coordinate system. More...
 
virtual const Vec2getPositionNormalized () const
 Returns the normalized position. More...
 
virtual const Vec2getNormalizedPosition () const
 
virtual void setPosition (float x, float y)
 Sets the position (x,y) of the node in its parent's coordinate system. More...
 
virtual void getPosition (float *x, float *y) const
 Gets position in a more efficient way, returns two number instead of a Vec2 object. More...
 
virtual void setPositionX (float x)
 Gets/Sets x or y coordinate individually for position. More...
 
virtual float getPositionX () const
 Gets the x coordinate of the node in its parent's coordinate system. More...
 
virtual void setPositionY (float y)
 Sets the y coordinate of the node in its parent's coordinate system. More...
 
virtual float getPositionY () const
 Gets the y coordinate of the node in its parent's coordinate system. More...
 
virtual void setPosition3D (const Vec3 &position)
 Sets the position (X, Y, and Z) in its parent's coordinate system. More...
 
virtual Vec3 getPosition3D () const
 Returns the position (X,Y,Z) in its parent's coordinate system. More...
 
virtual void setPositionZ (float positionZ)
 Sets the 'z' coordinate in the position. More...
 
virtual float getPositionZ () const
 Gets position Z coordinate of this node. More...
 
virtual void setSkewX (float skewX)
 Changes the X skew angle of the node in degrees. More...
 
virtual float getSkewX () const
 Returns the X skew angle of the node in degrees. More...
 
virtual void setSkewY (float skewY)
 Changes the Y skew angle of the node in degrees. More...
 
virtual float getSkewY () const
 Returns the Y skew angle of the node in degrees. More...
 
virtual void setAnchorPoint (const Vec2 &anchorPoint)
 Sets the anchor point in percent. More...
 
virtual const Vec2getAnchorPoint () const
 Returns the anchor point in percent. More...
 
virtual const Vec2getAnchorPointInPoints () const
 Returns the anchorPoint in absolute pixels. More...
 
virtual void setContentSize (const Size &contentSize)
 Sets the untransformed size of the node. More...
 
virtual const Size & getContentSize () const
 Returns the untransformed size of the node. More...
 
virtual void setVisible (bool visible)
 Sets whether the node is visible. More...
 
virtual bool isVisible () const
 Determines if the node is visible. More...
 
virtual void setRotation (float rotation)
 Sets the rotation (angle) of the node in degrees. More...
 
virtual float getRotation () const
 Returns the rotation of the node in degrees. More...
 
virtual void setRotation3D (const Vec3 &rotation)
 Sets the rotation (X,Y,Z) in degrees. More...
 
virtual Vec3 getRotation3D () const
 Returns the rotation (X,Y,Z) in degrees. More...
 
virtual void setRotationQuat (const Quaternion &quat)
 Set rotation by quaternion. More...
 
virtual Quaternion getRotationQuat () const
 Return the rotation by quaternion, Note that when _rotationZ_X == _rotationZ_Y, the returned quaternion equals to RotationZ_X * RotationY * RotationX, it equals to RotationY * RotationX otherwise. More...
 
virtual void setRotationSkewX (float rotationX)
 Sets the X rotation (angle) of the node in degrees which performs a horizontal rotational skew. More...
 
virtual float getRotationSkewX () const
 Gets the X rotation (angle) of the node in degrees which performs a horizontal rotation skew. More...
 
virtual void setRotationSkewY (float rotationY)
 Sets the Y rotation (angle) of the node in degrees which performs a vertical rotational skew. More...
 
virtual float getRotationSkewY () const
 Gets the Y rotation (angle) of the node in degrees which performs a vertical rotational skew. More...
 
virtual void setIgnoreAnchorPointForPosition (bool ignore)
 Sets whether the anchor point will be (0,0) when you position this node. More...
 
virtual bool isIgnoreAnchorPointForPosition () const
 Gets whether the anchor point will be (0,0) when you position this node. More...
 
virtual int getTag () const
 Returns a tag that is used to identify the node easily. More...
 
virtual void setTag (int tag)
 Changes the tag that is used to identify the node easily. More...
 
virtual const std::string & getName () const
 Returns a string that is used to identify the node. More...
 
virtual void setName (const std::string &name)
 Changes the name that is used to identify the node easily. More...
 
virtual void * getUserData ()
 Returns a custom user data pointer. More...
 
virtual const void * getUserData () const
 @lua NA
 
virtual void setUserData (void *userData)
 Sets a custom user data pointer. More...
 
virtual RefgetUserObject ()
 Returns a user assigned Object. More...
 
virtual const RefgetUserObject () const
 @lua NA
 
virtual void setUserObject (Ref *userObject)
 Returns a user assigned Object. More...
 
virtual void onEnterTransitionDidFinish ()
 Event callback that is invoked when the Node enters in the 'stage'. More...
 
virtual void onExit ()
 Event callback that is invoked every time the Node leaves the 'stage'. More...
 
virtual void onExitTransitionDidStart ()
 Event callback that is called every time the Node leaves the 'stage'. More...
 
virtual void setActionManager (ActionManager *actionManager)
 Sets the ActionManager object that is used by all actions. More...
 
virtual ActionManagergetActionManager ()
 Gets the ActionManager object that is used by all actions. More...
 
virtual const ActionManagergetActionManager () const
 
virtual ActionrunAction (Action *action)
 Executes an action, and returns the action that is executed. More...
 
void stopAllActions ()
 Stops and removes all actions from the running action list .
 
void stopAction (Action *action)
 Stops and removes an action from the running action list. More...
 
void stopActionByTag (int tag)
 Removes an action from the running action list by its tag. More...
 
void stopAllActionsByTag (int tag)
 Removes all actions from the running action list by its tag. More...
 
void stopActionsByFlags (unsigned int flags)
 Removes all actions from the running action list by its flags. More...
 
ActiongetActionByTag (int tag)
 Gets an action from the running action list by its tag. More...
 
ssize_t getNumberOfRunningActions () const
 Returns the numbers of actions that are running plus the ones that are schedule to run (actions in actionsToAdd and actions arrays). More...
 
ssize_t getNumberOfRunningActionsByTag (int tag) const
 Returns the numbers of actions that are running plus the ones that are schedule to run (actions in actionsToAdd and actions arrays) with a specific tag. More...
 
virtual void setScheduler (Scheduler *scheduler)
 Sets a Scheduler object that is used to schedule all "updates" and timers. More...
 
virtual SchedulergetScheduler ()
 Gets a Scheduler object. More...
 
virtual const SchedulergetScheduler () const
 
bool isScheduled (SEL_SCHEDULE selector) const
 Checks whether a selector is scheduled. More...
 
bool isScheduled (const std::string &key) const
 Checks whether a lambda function is scheduled. More...
 
void scheduleUpdate ()
 Schedules the "update" method. More...
 
void scheduleUpdateWithPriority (int priority)
 Schedules the "update" method with a custom priority. More...
 
void unscheduleUpdate ()
 
void schedule (SEL_SCHEDULE selector, float interval, unsigned int repeat, float delay)
 Schedules a custom selector. More...
 
void schedule (SEL_SCHEDULE selector, float interval)
 Schedules a custom selector with an interval time in seconds. More...
 
void scheduleOnce (SEL_SCHEDULE selector, float delay)
 Schedules a selector that runs only once, with a delay of 0 or larger. More...
 
void scheduleOnce (const std::function< void(float)> &callback, float delay, const std::string &key)
 Schedules a lambda function that runs only once, with a delay of 0 or larger. More...
 
void schedule (SEL_SCHEDULE selector)
 Schedules a custom selector, the scheduled selector will be ticked every frame. More...
 
void schedule (const std::function< void(float)> &callback, const std::string &key)
 Schedules a lambda function. More...
 
void schedule (const std::function< void(float)> &callback, float interval, const std::string &key)
 Schedules a lambda function. More...
 
void schedule (const std::function< void(float)> &callback, float interval, unsigned int repeat, float delay, const std::string &key)
 Schedules a lambda function. More...
 
void unschedule (SEL_SCHEDULE selector)
 Unschedules a custom selector. More...
 
void unschedule (const std::string &key)
 Unschedules a lambda function. More...
 
void unscheduleAllCallbacks ()
 Unschedule all scheduled selectors and lambda functions: custom selectors, and the 'update' selector and lambda functions. More...
 
virtual void resume ()
 Resumes all scheduled selectors, actions and event listeners. More...
 
virtual void pause ()
 Pauses all scheduled selectors, actions and event listeners. More...
 
virtual void update (float delta)
 Update method will be called automatically every frame if "scheduleUpdate" is called, and the node is "live". More...
 
virtual void updateTransform ()
 Calls children's updateTransform() method recursively. More...
 
virtual const Mat4getNodeToParentTransform () const
 Returns the matrix that transform the node's (local) space coordinates into the parent's space coordinates. More...
 
virtual AffineTransform getNodeToParentAffineTransform () const
 
virtual Mat4 getNodeToParentTransform (Node *ancestor) const
 Returns the matrix that transform the node's (local) space coordinates into the parent's space coordinates. More...
 
virtual AffineTransform getNodeToParentAffineTransform (Node *ancestor) const
 Returns the affine transform matrix that transform the node's (local) space coordinates into the parent's space coordinates. More...
 
virtual void setNodeToParentTransform (const Mat4 &transform)
 Sets the transformation matrix manually. More...
 
virtual const Mat4getParentToNodeTransform () const
 Returns the matrix that transform parent's space coordinates to the node's (local) space coordinates. More...
 
virtual AffineTransform getParentToNodeAffineTransform () const
 
virtual Mat4 getNodeToWorldTransform () const
 Returns the world affine transform matrix. More...
 
virtual AffineTransform getNodeToWorldAffineTransform () const
 
virtual Mat4 getWorldToNodeTransform () const
 Returns the inverse world affine transform matrix. More...
 
virtual AffineTransform getWorldToNodeAffineTransform () const
 
Vec2 convertToNodeSpace (const Vec2 &worldPoint) const
 Converts a Vec2 to node (local) space coordinates. More...
 
Vec2 convertToWorldSpace (const Vec2 &nodePoint) const
 Converts a Vec2 to world space coordinates. More...
 
Vec2 convertToNodeSpaceAR (const Vec2 &worldPoint) const
 Converts a Vec2 to node (local) space coordinates. More...
 
Vec2 convertToWorldSpaceAR (const Vec2 &nodePoint) const
 Converts a local Vec2 to world space coordinates.The result is in Points. More...
 
Vec2 convertTouchToNodeSpace (Touch *touch) const
 convenience methods which take a Touch instead of Vec2. More...
 
Vec2 convertTouchToNodeSpaceAR (Touch *touch) const
 converts a Touch (world coordinates) into a local coordinate. More...
 
void setAdditionalTransform (const Mat4 *additionalTransform)
 Sets an additional transform matrix to the node. More...
 
void setAdditionalTransform (const Mat4 &additionalTransform)
 
void setAdditionalTransform (const AffineTransform &additionalTransform)
 
Component * getComponent (const std::string &name)
 Gets a component by its name. More...
 
virtual bool addComponent (Component *component)
 Adds a component. More...
 
virtual bool removeComponent (const std::string &name)
 Removes a component by its name. More...
 
virtual bool removeComponent (Component *component)
 Removes a component by its pointer. More...
 
virtual void removeAllComponents ()
 Removes all components.
 
virtual std::string getDescription () const
 Gets the description string. More...
 
virtual void addChild (Node *child)
 Adds a child to the container with z-order as 0. More...
 
virtual void addChild (Node *child, int localZOrder)
 Adds a child to the container with a local z-order. More...
 
virtual void addChild (Node *child, int localZOrder, int tag)
 Adds a child to the container with z order and tag. More...
 
virtual void addChild (Node *child, int localZOrder, const std::string &name)
 Adds a child to the container with z order and tag. More...
 
virtual NodegetChildByTag (int tag) const
 Gets a child from the container with its tag. More...
 
template<typename T >
getChildByTag (int tag) const
 Gets a child from the container with its tag that can be cast to Type T. More...
 
virtual NodegetChildByName (const std::string &name) const
 Gets a child from the container with its name. More...
 
template<typename T >
getChildByName (const std::string &name) const
 Gets a child from the container with its name that can be cast to Type T. More...
 
virtual void enumerateChildren (const std::string &name, std::function< bool(Node *node)> callback) const
 Search the children of the receiving node to perform processing for nodes which share a name. More...
 
virtual Vector< Node * > & getChildren ()
 Returns the array of the node's children. More...
 
virtual const Vector< Node * > & getChildren () const
 
virtual ssize_t getChildrenCount () const
 Returns the amount of children. More...
 
virtual void setParent (Node *parent)
 Sets the parent node. More...
 
virtual NodegetParent ()
 Returns a pointer to the parent node. More...
 
virtual const NodegetParent () const
 
virtual void removeFromParent ()
 Removes this node itself from its parent node with a cleanup. More...
 
virtual void removeFromParentAndCleanup (bool cleanup)
 Removes this node itself from its parent node. More...
 
virtual void removeChild (Node *child, bool cleanup=true)
 Removes a child from the container. More...
 
virtual void removeChildByTag (int tag, bool cleanup=true)
 Removes a child from the container by tag value. More...
 
virtual void removeChildByName (const std::string &name, bool cleanup=true)
 Removes a child from the container by tag value. More...
 
virtual void removeAllChildren ()
 Removes all children from the container with a cleanup. More...
 
virtual void removeAllChildrenWithCleanup (bool cleanup)
 Removes all children from the container, and do a cleanup to all running actions depending on the cleanup parameter. More...
 
virtual void reorderChild (Node *child, int localZOrder)
 Reorders a child according to a new z value. More...
 
virtual void sortAllChildren ()
 Sorts the children array once before drawing, instead of every time when a child is added or reordered. More...
 
- Public Member Functions inherited from Ref
void retain ()
 Retains the ownership. More...
 
void release ()
 Releases the ownership immediately. More...
 
Refautorelease ()
 Releases the ownership sometime soon automatically. More...
 
unsigned int getReferenceCount () const
 Returns the Ref's current reference count. More...
 
virtual ~Ref ()
 Destructor. More...
 

Static Public Member Functions

static Terraincreate (TerrainData &parameter, CrackFixedType fixedType=CrackFixedType::INCREASE_LOWER)
 create entry
 
- Static Public Member Functions inherited from Node
static Nodecreate ()
 Allocates and initializes a node. More...
 
static int getAttachedNodeCount ()
 Gets count of nodes those are attached to scene graph.
 
template<typename _T >
static void sortNodes (cocos2d::Vector< _T * > &nodes)
 Sorts helper function. More...
 

Additional Inherited Members

- Public Attributes inherited from Ref
unsigned int _ID
 object id, ScriptSupport need public _ID
 
int _luaID
 Lua reference id.
 
void * _scriptObject
 scriptObject, support for swift
 
bool _rooted
 When true, it means that the object was already rooted.
 
- Static Public Attributes inherited from Node
static const int INVALID_TAG = -1
 Default tag used for all the nodes.
 

Detailed Description

Terrain Defines a Terrain that is capable of rendering large landscapes from 2D heightmap images.

Terrains can be constructed from several different internal formats heightmap sources:

  1. RGB888
  2. RGBA8888
  3. Luminance(gray-scale)8

Terrain use TerrainData struct to initialize.the TerrainData struct warp all parameters that Terrain initialization need. TerrainData provide several handy constructor for users

Surface detail is provided via texture splatting, where multiple Detail texture layers can be added along with alpha map to define how different Detail texture blend with each other. These DetailTexture can be defined in TerrainData. The number of supported Detail texture is Four. although typically 2-3 levels is sufficient. For simple usage ,surface detail also is provided via simple Texture.

Internally, Terrain is divide into smaller, more manageable chunks, which can be culled separately for more efficient rendering. The size of the terrain chunks can be controlled via the chunkSize property in TerrainData.

Chunks are managed under the QuadTree.As DE FACTO terminal Node of the QuadTree; let us cull chunks efficiently to reduce drawCall amount And reduce the VBOs'Size that pass to the GPU.

Level of detail (LOD) is supported using a technique that is similar to texture mipmapping – called GeoMapping. A distance-to-camera based test used to decide the appropriate LOD for a terrain chunk. The number of LOD levels is 0 by default (which means only the base level is used),the maximum number of LOD levels is 4. Of course ,you can hack the value individually.

Finally, when LOD is enabled, cracks can begin to appear between terrain Chunks of different LOD levels. An acceptable solution might be to simply reduce the lower LOD(high detail,smooth) chunks border, And let the higher LOD(rough) chunks to seamlessly connect it.

We can use ray-terrain intersection to pick a point of the terrain; Also we can get an arbitrary point of the terrain's height and normal vector for convenience .

Member Enumeration Documentation

◆ CrackFixedType

enum CrackFixedType
strong

the crack fix type.

use to fix the gaps between different LOD chunks

Member Function Documentation

◆ setLightDir()

void setLightDir ( const Vec3 lightDir)

set directional light for the terrain

Parameters
lightDirThe direction of directional light, Note that lightDir is in the terrain's local space. Most of the time terrain is placed at (0,0,0) and without rotation, so lightDir is also in the world space.

◆ getHeight() [1/2]

float getHeight ( float  x,
float  z,
Vec3 normal = nullptr 
) const

get specified position's height mapping to the terrain,use bi-linear interpolation method

Parameters
xthe X position
zthe Z position
normalthe specified position's normal vector in terrain . if this argument is NULL or nullptr,Normal calculation shall be skip.
Returns
the height value of the specified position of the terrain, if the (X,Z) position is out of the terrain bounds,it shall return 0;

◆ getHeight() [2/2]

float getHeight ( const Vec2 pos,
Vec3 normal = nullptr 
) const

get specified position's height mapping to the terrain,use bi-linear interpolation method

Parameters
posthe position (X,Z)
normalthe specified position's normal vector in terrain . if this argument is NULL or nullptr,Normal calculation shall be skip.
Returns
the height value of the specified position of the terrain, if the (X,Z) position is out of the terrain bounds,it shall return 0;

◆ getNormal()

Vec3 getNormal ( int  pixelX,
int  pixelY 
) const

get the normal of the specified position in terrain

Returns
the normal vector of the specified position of the terrain.
Note
the fast normal calculation may not get precise normal vector.

◆ setDrawWire()

void setDrawWire ( bool  boolValue)

show the wireline instead of the surface,Debug Use only.

@Note only support desktop platform

◆ draw()

virtual void draw ( cocos2d::Renderer *  renderer,
const cocos2d::Mat4 transform,
uint32_t  flags 
)
overridevirtual

Override this method to draw your own node.

The following GL states will be enabled by default:

  • glEnableClientState(GL_VERTEX_ARRAY);
  • glEnableClientState(GL_COLOR_ARRAY);
  • glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  • glEnable(GL_TEXTURE_2D); AND YOU SHOULD NOT DISABLE THEM AFTER DRAWING YOUR NODE But if you enable any other GL state, you should disable it after drawing your node.
Parameters
rendererA given renderer.
transformA transform matrix.
flagsRenderer flag.

Reimplemented from Node.

◆ getIntersectionPoint() [1/2]

Vec3 getIntersectionPoint ( const Ray ray) const

Ray-Terrain intersection.

Returns
the intersection point

◆ getIntersectionPoint() [2/2]

bool getIntersectionPoint ( const Ray ray,
Vec3 intersectionPoint 
) const

Ray-Terrain intersection.

Parameters
rayto hit the terrain
intersectionPointhit point if hit
Returns
true if hit, false otherwise

The documentation for this class was generated from the following file: