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| #include <math.h> | ||
| #include "Arrow.h" | ||
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| #define DEFAUT_NUMFAI 16 | ||
| #define DEFAUT_CONERAD 5 | ||
| #define DEFAUT_CONERATIO 2.5 | ||
| #define DEFAUT_R_R_Ratio 0.4 | ||
| void Arrow::Set(int nfai) | ||
| { | ||
| int i; | ||
| double ang,step; | ||
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| if( m_nfai == nfai) return; | ||
| m_nfai = nfai; | ||
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| if(m_sinfai != NULL) delete m_sinfai; m_sinfai = NULL; | ||
| if(m_cosfai != NULL) delete m_cosfai; m_cosfai = NULL; | ||
| if(m_conetx != NULL) delete m_conetx; m_conetx = NULL; | ||
| if(m_conety != NULL) delete m_conety; m_conety = NULL; | ||
| if(m_cylindtx != NULL) delete m_cylindtx; m_cylindtx = NULL; | ||
| if(m_cylindty != NULL) delete m_cylindty; m_cylindty = NULL; | ||
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| m_sinfai = new float[m_nfai]; | ||
| m_cosfai = new float[m_nfai]; | ||
| m_conetx = new float[m_nfai]; | ||
| m_conety = new float[m_nfai]; | ||
| m_cylindtx = new float[m_nfai]; | ||
| m_cylindty = new float[m_nfai]; | ||
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| step = (2.*3.14159265359)/ (double) (m_nfai-1); | ||
| for(i=0; i<m_nfai; i++) | ||
| { | ||
| ang = step *(double) i; | ||
| m_cosfai[i] = cos(ang); | ||
| m_sinfai[i] = sin(ang); | ||
| } | ||
| m_cosfai[m_nfai-1] = m_cosfai[0]; | ||
| m_sinfai[m_nfai-1] = m_sinfai[0]; | ||
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| for(i=0; i<m_nfai; i++) | ||
| { | ||
| m_conetx[i] = m_coneR*m_cosfai[i]; | ||
| m_conety[i] = m_coneR*m_sinfai[i]; | ||
| m_cylindtx[i] = m_cylindR*m_cosfai[i]; | ||
| m_cylindty[i] = m_cylindR*m_sinfai[i]; | ||
| } | ||
| return; | ||
| } | ||
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| Arrow::~Arrow() | ||
| { | ||
| if(m_cosfai != NULL) delete m_cosfai; m_cosfai = NULL; | ||
| if(m_sinfai != NULL) delete m_sinfai; m_sinfai = NULL; | ||
| if(m_conetx != NULL) delete m_conetx; m_conetx = NULL; | ||
| if(m_conety != NULL) delete m_conety; m_conety = NULL; | ||
| if(m_cylindtx != NULL) delete m_cylindtx; m_cylindtx = NULL; | ||
| if(m_cylindty != NULL) delete m_cylindty; m_cylindty = NULL; | ||
| } | ||
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| Arrow::Arrow():Line() | ||
| { | ||
| m_ratio = DEFAUT_CONERATIO; | ||
| m_coneR = size = DEFAUT_CONERAD; | ||
| m_coneL = m_ratio*m_coneR; | ||
| m_cylindR = m_coneR*DEFAUT_R_R_Ratio; | ||
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| m_nfai = 0; | ||
| m_sinfai = NULL; | ||
| m_cosfai = NULL; | ||
| m_conetx = NULL; | ||
| m_conety = NULL; | ||
| m_cylindtx = NULL; | ||
| m_cylindty = NULL; | ||
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| Set(DEFAUT_NUMFAI); | ||
| ResetStartPoint(Startx, Starty, Startz); | ||
| ResetEndPoint(Endx, Endy, Endz); | ||
| } | ||
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| Arrow::Arrow(float x0, float y0, float z0, float x1, float y1, float z1):Line(x0,y0,z0,x1,y1,z1) | ||
| { | ||
| m_ratio = DEFAUT_CONERATIO; | ||
| m_coneR = size = DEFAUT_CONERAD; | ||
| m_coneL = m_ratio*m_coneR; | ||
| m_cylindR = m_coneR*DEFAUT_R_R_Ratio; | ||
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| m_nfai = 0; | ||
| m_sinfai = NULL; | ||
| m_cosfai = NULL; | ||
| m_conetx = NULL; | ||
| m_conety = NULL; | ||
| m_cylindtx = NULL; | ||
| m_cylindty = NULL; | ||
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| Set(DEFAUT_NUMFAI); | ||
| ResetStartPoint(Startx, Starty, Startz); | ||
| ResetEndPoint(Endx, Endy, Endz); | ||
| } | ||
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| void Arrow::ChangeSize(float NewSize) | ||
| { | ||
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| if(m_fullL == 0.f) return; | ||
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| m_coneR = size = NewSize; | ||
| m_coneL = m_ratio*m_coneR; | ||
| m_cylindR = m_coneR*DEFAUT_R_R_Ratio; | ||
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| for(int i=0; i<m_nfai; i++) | ||
| { | ||
| m_conetx[i] = m_coneR*m_cosfai[i]; | ||
| m_conety[i] = m_coneR*m_sinfai[i]; | ||
| m_cylindtx[i] = m_cylindR*m_cosfai[i]; | ||
| m_cylindty[i] = m_cylindR*m_sinfai[i]; | ||
| } | ||
| return; | ||
| } | ||
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| #define PI_DEGREE 57.2957795 | ||
| void Arrow::Paint() | ||
| { | ||
| if(m_fullL <= 0.f) return; | ||
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| int i; | ||
| double len,dx,dy,dz,ang; | ||
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| dx = (Endx-Startx); | ||
| dy = (Endy-Starty); | ||
| dz = (Endz-Startz); | ||
| ang = acos(dz/m_fullL)*PI_DEGREE; | ||
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| glColor4f(R,G,B,A); | ||
| glPushMatrix(); | ||
| glTranslatef(Startx, Starty, Startz); | ||
| glRotatef((float)ang, -(float)dy, (float)dx, 0.f); | ||
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| float ratio = m_coneL/m_fullL; | ||
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| if(ratio<1.f) | ||
| { | ||
| //paint the cylinder bottom | ||
| glNormal3f(0.f, 0.f, -1.f); | ||
| glBegin(GL_TRIANGLE_FAN); | ||
| glVertex3f(0.f, 0.f, 0.f); | ||
| for(i=m_nfai-1; i>=0; i--) | ||
| glVertex3f(m_cylindtx[i], m_cylindty[i], 0.f); | ||
| glEnd(); | ||
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| //Then draw the surround of cylinder | ||
| glBegin(GL_TRIANGLE_STRIP); | ||
| for(i=0; i<m_nfai; i++) | ||
| { | ||
| glNormal3f(m_cosfai[i], m_sinfai[i], 0.0); | ||
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| glVertex3f(m_cylindtx[i], m_cylindty[i], m_fullL-m_coneL); | ||
| glVertex3f(m_cylindtx[i], m_cylindty[i], 0.f); | ||
| } | ||
| glEnd(); | ||
| //Then draw the cone | ||
| glTranslatef(0.f, 0.f, m_fullL-m_coneL); | ||
| glNormal3d(0., 0., -1.); | ||
| glBegin(GL_TRIANGLE_FAN); | ||
| glVertex3d(0., 0., 0.); | ||
| for(i=m_nfai-1; i>=0; i--) | ||
| glVertex3f(m_conetx[i], m_conety[i], 0.f); | ||
| glEnd(); | ||
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| glBegin(GL_TRIANGLE_STRIP); | ||
| for(i=0; i<m_nfai; i++) | ||
| { | ||
| glNormal3f(m_cosfai[i], m_sinfai[i], 0.f); | ||
| glVertex3f(0.f, 0.f, m_coneL); | ||
| glVertex3f(m_conetx[i], m_conety[i], 0.0); | ||
| } | ||
| glEnd(); | ||
| } | ||
| else | ||
| { | ||
| ratio = 1.f/ratio; | ||
| // draw the cone bottom | ||
| glNormal3d(0., 0., -1.); | ||
| glBegin(GL_TRIANGLE_FAN); | ||
| glVertex3d(0., 0., 0.); | ||
| for(i=m_nfai-1; i>=0; i--) | ||
| glVertex3f(m_conetx[i]*ratio, m_conety[i]*ratio, 0.f); | ||
| glEnd(); | ||
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| glBegin(GL_TRIANGLE_STRIP); | ||
| for(i=0; i<m_nfai; i++) | ||
| { | ||
| glNormal3f(m_cosfai[i], m_sinfai[i], 0.f); | ||
| glVertex3f(0.f, 0.f, m_coneL*ratio); | ||
| glVertex3f(m_conetx[i]*ratio, m_conety[i]*ratio, 0.f); | ||
| } | ||
| glEnd(); | ||
| } | ||
| glPopMatrix(); | ||
| return; | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| #ifndef _ARROW | ||
| #define _ARROW | ||
| #include "Line.h" | ||
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| class Arrow:public Line | ||
| { | ||
| private: | ||
| float m_ratio; | ||
| protected: | ||
| int m_nfai; | ||
| float m_cylindR, m_cylindL, m_coneR, m_coneL, m_fullL; | ||
| float*m_cosfai, *m_sinfai; | ||
| float*m_cylindtx, *m_cylindty; | ||
| float*m_conetx, *m_conety; | ||
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| public: | ||
| ~Arrow(); | ||
| Arrow(); | ||
| Arrow(float,float,float,float,float,float); | ||
| virtual void Paint(); | ||
| void Set(int nfai); | ||
| void ResetStartPoint(float, float, float); | ||
| void ResetEndPoint(float, float, float); | ||
| void ChangeColor(float, float, float); | ||
| void ChangeColor(float*); | ||
| void ChangeSize(float); | ||
| }; | ||
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| inline void Arrow::ResetStartPoint(float x, float y, float z) | ||
| { | ||
| float dx,dy,dz; | ||
| Startx = x; | ||
| Starty = y; | ||
| Startz = z; | ||
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| dx = Endx - Startx; | ||
| dy = Endy - Starty; | ||
| dz = Endz - Startz; | ||
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| m_fullL = (float)sqrt(dx*dx + dy*dy + dz*dz); | ||
| return; | ||
| } | ||
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| inline void Arrow::ResetEndPoint(float x, float y, float z) | ||
| { | ||
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| float dx,dy,dz; | ||
| Endx = x; | ||
| Endy = y; | ||
| Endz = z; | ||
| dx = Endx - Startx; | ||
| dy = Endy - Starty; | ||
| dz = Endz - Startz; | ||
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| m_fullL = (float)sqrt(dx*dx + dy*dy + dz*dz); | ||
| return; | ||
| } | ||
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| inline void Arrow::ChangeColor(float NewR, float NewG, float NewB) | ||
| { | ||
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| R = NewR; | ||
| G = NewG; | ||
| B = NewB; | ||
| return; | ||
| } | ||
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| inline void Arrow::ChangeColor(float Color[3]) | ||
| { | ||
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| R = Color[0]; | ||
| G = Color[1]; | ||
| B = Color[2]; | ||
| return; | ||
| } | ||
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| #endif |
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