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EUC_Expression.h
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1 /*
2  * Copyright (c) 2021
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24  *
25  *----------------------------------------------------------------------------
26  * Defines the expressions that can be performed on sets of
27  * euclidean objects.
28  */
29 
30 #ifndef __EUC_Expression__
31 #define __EUC_Expression__
32 
33 #include "EUC_Object.h"
34 
35 #include <UT/UT_ValArray.h>
36 
37 namespace HDK_Sample {
38 
41 
42 // Generic expression.
44 {
45 public:
47 protected:
48  virtual ~EUC_Expression();
49 public:
50  // This is a refence counted object.
51  void addRef();
52  void removeRef();
53 
54  // Each expression gets a global id which is constant for this
55  // runtime invocation. This lets one marshal an expression pointer
56  // as an id and safely determine if it still exists.
57  int getUid() const { return myUid; }
58  static EUC_Expression *getExprFromUid(int uid);
59 
60  void applyLook(EUC_Object *obj);
61  void setLook(bool visible, const UT_Vector3 &cd);
62 
63  // Evaluates the set of rules given, generating a bunch of
64  // EUC_Objects.
65  void evaluate(EUC_ObjectList &results);
66 
67 protected:
68  // Evaluates this expression. Initializes result to the output
69  // of this expression. totalobj gets any net-new objects
70  // added to it.
72  EUC_ObjectList &totalobj) = 0;
73 
74 public:
75  // Handles the recursive evaluation including caching the results
76  // so we don't evaluate an expression twice in a single invocation.
78  EUC_ObjectList &totalobj);
79 private:
80  int myRefCount;
81  int myUid;
82 
83  // Our look for net-new objects
84  bool myVisible;
85  UT_Vector3 myCd;
86 
87  // Global list of expressions
88  static EUC_ExpressionList ourExpressionList;
89 
90  // Our cache of results
91  EUC_ObjectList myObjectCache;
92  int myLastEvaluateTime;
93  static int ourEvaluateTime;
94 };
95 
96 // Creates a point.
98 {
99 public:
100  EUC_ExprPoint(const UT_Vector2 &pos);
101 
102 protected:
104  EUC_ObjectList &totalobj) override;
105 protected:
107 };
108 
109 // Creates a point from an object, extracting it as necessary.
111 {
112 public:
114  ~EUC_ExprPointFromObject() override;
115 
116 protected:
118  EUC_ObjectList &totalobj) override;
119 protected:
121  int myIndex;
122 };
123 
124 // Creates a line from a pair of points
126 {
127 public:
129  ~EUC_ExprLineFromPoints() override;
130 
131 protected:
133  EUC_ObjectList &totalobj) override;
134 protected:
136 };
137 
138 // Creates a circle from a pair of points
140 {
141 public:
143  ~EUC_ExprCircleFromPoints() override;
144 
145 protected:
147  EUC_ObjectList &totalobj) override;
148 protected:
150 };
151 
152 // Intersects two objects.
154 {
155 public:
157  ~EUC_ExprIntersect() override;
158 
159 protected:
161  EUC_ObjectList &totalobj) override;
162 protected:
164 };
165 
166 // Selects on object out of an expressions result list.
168 {
169 public:
170  EUC_ExprSelect(EUC_Expression *src, int idx);
171  ~EUC_ExprSelect() override;
172 
173 protected:
175  EUC_ObjectList &totalobj) override;
176 protected:
178  int myIndex;
179 };
180 
181 }
182 
183 #endif
void applyLook(EUC_Object *obj)
void evaluateSubclass(EUC_ObjectList &result, EUC_ObjectList &totalobj) override
GLenum src
Definition: glew.h:2410
void evaluateSubclass(EUC_ObjectList &result, EUC_ObjectList &totalobj) override
static EUC_Expression * getExprFromUid(int uid)
void evaluate(EUC_ObjectList &results)
EUC_ExprLineFromPoints(EUC_Expression *pta, EUC_Expression *ptb)
GLhandleARB obj
Definition: glew.h:6236
EUC_ExprIntersect(EUC_Expression *expra, EUC_Expression *exprb)
EUC_ExprPointFromObject(EUC_Expression *src, int idx)
void evaluateSubclass(EUC_ObjectList &result, EUC_ObjectList &totalobj) override
virtual void evaluateSubclass(EUC_ObjectList &result, EUC_ObjectList &totalobj)=0
void setLook(bool visible, const UT_Vector3 &cd)
EUC_ExprCircleFromPoints(EUC_Expression *center, EUC_Expression *pt)
void evaluateSubclass(EUC_ObjectList &result, EUC_ObjectList &totalobj) override
UT_ValArray< EUC_Expression * > EUC_ExpressionList
EUC_ExprPoint(const UT_Vector2 &pos)
void evaluateRecurse(EUC_ObjectList &result, EUC_ObjectList &totalobj)
GLuint64EXT * result
Definition: glew.h:14007
EUC_ExprSelect(EUC_Expression *src, int idx)
void evaluateSubclass(EUC_ObjectList &result, EUC_ObjectList &totalobj) override
void evaluateSubclass(EUC_ObjectList &result, EUC_ObjectList &totalobj) override