I am using vc, through basic point, line, surface function after drawing the basic shapes, such as graphics is a geometry, the geometry of the operation, such as I drew a rectangular box, and then draw a circle, if the two graphics line intersect, together with is how to determine? This boundary, for example, can put the two graphics together,

CodePudding user response:

Involved in mathematical modeling,,
Implement some detection function, rectangle, circle, triangle, objects can test whether intersect each other (collision detection), and returns the node/contact, such as
General games are simple bounding box box, and building box, box collision,
Lazy can try the next box2d,
Box2D is an object used to simulate 2 d rigid body in the c + + engine, zlib license is a free software license agreement, but not a copyleft,
For example: write a table tennis game, with 2 d physics engine is ok,

CodePudding user response:

My figure is like this:


Through the basic drawing graphics the basic geometry, if the two geometries, how together?

CodePudding user response:

See you how to implement, data structure, a feasible method is:
Low set a the base class for all graphical BaseGraph, all graphics are derived from this class,
Establishing various subclasses of graphics, such as straight line, arc class;
Low set up special nodes: merge node class, its internal can accommodate other graphics class,
Low with a container to place these nodes, in the window to redraw, delete selected in view of the first node (not visible nodes do not need to draw), and then implement re-paint,,

Pseudo code:

 
Public abstract class BaseGraph 
{
Public Rectange localRect {get; The set; }=Vector2. Zero;//the coordinates relative to the parent node 
Public Rectangle worldRect//view coordinate system coordinates, 
{
The get {return LocalRectangleToWorldRectangle (localRect); } 
The set {localRect=WorldRectangleToLocalRectangle (value); } 
} 
Public BaseGrpah Parent {get; The set; }=null;//parent node 
Public abstract void ontouch ();//draw 
Public Rectangle LocalRectangleToWorldRectangle (Rectangle rc);//local coordinate conversion coordinates for the world 
Public Rectangle WorldRectangleToLocalRectangle (Rectangle rc);//the world coordinate is converted to a local coordinate 
} 

Public class Line: BaseGraph 
{
Public overwrite void ontouch () 
{
DrawLine (worldRect worldRect. Left, top, worldRect. Right, worldRect, bottom); 
} 
} 

. Other node... 

Public class CombinNode: BaseGraph 
{
List Childrens. 

Public void AddChildren (BaseGraph node) 
{
Node. The parent=this; 
Childrens. Add (node); 
} 

Public overrite void ontouch () 
{
The foreach (var node in childrens) 
{
Node. Ontouch (); 
} 
} 
} 

//... 

CodePudding user response:

To learn OpenGL, you can refer to OpenFlight, OSG

CodePudding user response:

reference 4 floor sichuanwww response:

to learn OpenGL, can consult OpenFlight, OSG

OpenFlight is why?

CodePudding user response:

Vector graphics set, refer to www.52vr.com