158 lines
4.5 KiB
C++
158 lines
4.5 KiB
C++
/*************/
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/*** Utils ***/
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/*************/
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#include "stdafx.h"
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#include "gl3d.h"
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#include <gl\gl.h>
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#include <gl\glu.h>
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#include <gl\glut.h>
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#include "GLEnabledView.h"
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#include "maths.h"
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#include "Utils.H"
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/**************************************************************************************/
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void DbgMsg(const char * pszFmt,...)
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{
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char szBuf[256];
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if (pszFmt)
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{
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va_list args;
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va_start(args,pszFmt);
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vsprintf(szBuf,pszFmt,args);
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OutputDebugString(szBuf);
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va_end(args);
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}
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}
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/**************************************************************************************/
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/**************************************************************************************/
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void BuildGLBox(float XMin,float XMax,float YMin,float YMax,float ZMin,float ZMax)
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{
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// Bottom Face
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glNormal3f( 0.0f,-1.0f, 0.0f);
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glVertex3f( XMin, YMin, ZMin);
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glVertex3f( XMax, YMin, ZMin);
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glVertex3f( XMax, YMin, ZMax);
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glVertex3f( XMin, YMin, ZMax);
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// Front Face
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glNormal3f( 0.0f, 0.0f, 1.0f);
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glVertex3f( XMin, YMin, ZMax);
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glVertex3f( XMax, YMin, ZMax);
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glVertex3f( XMax, YMax, ZMax);
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glVertex3f( XMin, YMax, ZMax);
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// Back Face
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glNormal3f( 0.0f, 0.0f,-1.0f);
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glVertex3f( XMin, YMin, ZMin);
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glVertex3f( XMin, YMax, ZMin);
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glVertex3f( XMax, YMax, ZMin);
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glVertex3f( XMax, YMin, ZMin);
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// Right face
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glNormal3f( 1.0f, 0.0f, 0.0f);
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glVertex3f( XMax, YMin, ZMin);
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glVertex3f( XMax, YMax, ZMin);
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glVertex3f( XMax, YMax, ZMax);
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glVertex3f( XMax, YMin, ZMax);
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// Left Face
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glNormal3f(-1.0f, 0.0f, 0.0f);
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glVertex3f( XMin, YMin, ZMin);
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glVertex3f( XMin, YMin, ZMax);
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glVertex3f( XMin, YMax, ZMax);
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glVertex3f( XMin, YMax, ZMin);
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// Top Face
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glNormal3f( 0.0f, 1.0f, 0.0f);
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glVertex3f( XMin, YMax, ZMin);
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glVertex3f( XMin, YMax, ZMax);
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glVertex3f( XMax, YMax, ZMax);
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glVertex3f( XMax, YMax, ZMin);
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}
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/**************************************************************************************/
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void BuildGLBoxNoNormals(float XMin,float XMax,float YMin,float YMax,float ZMin,float ZMax)
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{
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// Bottom Face
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glVertex3f( XMin, YMin, ZMin);
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glVertex3f( XMax, YMin, ZMin);
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glVertex3f( XMax, YMin, ZMax);
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glVertex3f( XMin, YMin, ZMax);
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// Front Face
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glVertex3f( XMin, YMin, ZMax);
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glVertex3f( XMax, YMin, ZMax);
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glVertex3f( XMax, YMax, ZMax);
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glVertex3f( XMin, YMax, ZMax);
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// Back Face
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glVertex3f( XMin, YMin, ZMin);
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glVertex3f( XMin, YMax, ZMin);
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glVertex3f( XMax, YMax, ZMin);
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glVertex3f( XMax, YMin, ZMin);
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// Right face
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glVertex3f( XMax, YMin, ZMin);
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glVertex3f( XMax, YMax, ZMin);
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glVertex3f( XMax, YMax, ZMax);
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glVertex3f( XMax, YMin, ZMax);
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// Left Face
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glVertex3f( XMin, YMin, ZMin);
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glVertex3f( XMin, YMin, ZMax);
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glVertex3f( XMin, YMax, ZMax);
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glVertex3f( XMin, YMax, ZMin);
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// Top Face
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glVertex3f( XMin, YMax, ZMin);
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glVertex3f( XMin, YMax, ZMax);
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glVertex3f( XMax, YMax, ZMax);
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glVertex3f( XMax, YMax, ZMin);
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}
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/**************************************************************************************/
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void BuildGLQuad(float XMin,float XMax,float YMin,float YMax,float Z)
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{
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// Front Face
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glNormal3f( 0.0f, 0.0f, 1.0f);
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glVertex3f( XMin, YMin, Z);
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glVertex3f( XMax, YMin, Z);
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glVertex3f( XMax, YMax, Z);
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glVertex3f( XMin, YMax, Z);
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}
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/**************************************************************************************/
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/**************************************************************************************/
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/**************************************************************************************/
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void TNormalise(TVECTOR &V)
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{
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float SqMag = V.length2();// v.x * v.x + v.y * v.y + v.z * v.z;
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if (SqMag> 0.001f)
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{
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float Mag = (float)sqrt( SqMag);
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V/=Mag;
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}
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}
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/**************************************************************************************/
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TVECTOR TCrossProduct(TVECTOR const &V0,TVECTOR const &V1,const TVECTOR &V2 )
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{
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TVECTOR DV1, DV2;
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TVECTOR Out;
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DV1.X() = V1.X() - V0.X();
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DV1.Y() = V1.Y() - V0.Y();
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DV1.Z() = V1.Z() - V0.Z();
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DV2.X() = V2.X() - V0.X();
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DV2.Y() = V2.Y() - V0.Y();
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DV2.Z() = V2.Z() - V0.Z();
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Out.SetX( (DV1.Z() * DV2.Y()) - (DV1.Y() * DV2.Z()) );
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Out.SetY( (DV1.X() * DV2.Z()) - (DV1.Z() * DV2.X()) );
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Out.SetZ( (DV1.Y() * DV2.X()) - (DV1.X() * DV2.Y()) );
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TNormalise(Out);
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return Out;
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}
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/**************************************************************************************/
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/**************************************************************************************/
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/**************************************************************************************/
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