Bonjour, j'utilise MS Visual C++ 2005 et je dois afficher une scene 3D comprenant une maison (2 polygones : pavé & toit)
Mes structures sont définies mais je ne sait pas comment & quelles sont les fonctions pour afficher un polygone ?
Dans mon cours on me dit d'appeller aussi une fonction permettant de dessiner des triangles (possibiliter d'implémenter).
void scanCon2DTr(HDC hdc, int x1, int y1, int x2, int y2, int x3, int y3, COLORREF c);

DataStruct.h :
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#ifndef	_3D_DATASTRUCT_H
#define _3D_DATASTRUCT_H
 
  #include "windows.h"
 
 
/*	Colour */
	typedef struct structTagRGBColour
		{
		int	red, green, blue;		/* red, green, blue components*/
		}
			RGBColour,				/* RGB colour */
			* pRGBColour;			/* pointer to RGB colour */
 
/*	2D vertex */
	typedef	  struct	tagVertex2D
				{
               double x, y;	/* x and y coordinates of a vertex */
               }	Vertex2D,                  		/* 2D vertex */
               		* pVertex2D;                  	/* pointer to 2D vertex */
 
/*	3D vertex */
	typedef	  struct	tagVertex
					{
               double x, y, z;	/* x, y, and z coordinates of a vertex */
               }	Vertex3D,                  		/* 3D vertex */
               		* pVertex3D;                  	/* pointer to 3D vertex */
 
 
/*	3D polygon */
	typedef struct structTag3DPolygon
		{
		int			f3SidedPoly[3];      /* each integer is index of vertex in array of vertices for object */
 
		int			visible;			/* polygon visibility flag: 1 -> visible, 0 ->invisible */
 
		}
			f3DPolygon,					/* 3D polygon */
			* p3DPolygon,				/* pointer to 3D polygon */
			f3DFacet,					/* 3D facet */
			* p3DFacet;					/* pointer to 3D facet */
 
/*	3D object */
	typedef struct structTag3DObject
		{
		p3DFacet			pFacetArray;			/* array of facets */
		int					numFacets;				/* number of object facets */ 
 
		pVertex3D			pVertexArray;			/* array of vertex coordinates */
		int					numVertices;			/* count of object vertices */
 
													/* modelling transformation parameters */
		Vertex3D			worldPosition;			/* object position */
		double				xScale, yScale, zScale; /* object's x, y, and z scale factors */
		double				rotXAngle, rotYAngle, rotZAngle;	/* object's x, y, and z angle (degrees) of rotation */
 
		RGBColour				colour;				/* object colour */
 
		int					visible;				/* object visibility flag: 1 -> visible, 0 ->invisible */
		}
			f3DObject,				/* 3D Object */
			* p3DObject;			/* pointer to 3D object */
 
 
 
/*	Object group */
	typedef struct structTag3DObjectGroup
		{
		p3DObject	pObjectArray;					/* array of objects in group */
		int			numObjs;						/* count of objects in group */
 
		}
			f3DObjectGroup,					/* group of 3D object */
			* p3DObjectGroup;				/* pointer to group of 3D object */
 
 
/*	Scene */
	typedef struct structTag3DScene
		{
		p3DObjectGroup	pObjGroupArray;				/* array of grouped scene objects */
		int				numObjGroups;				/* count of grouped scene objects */
 
		}
			f3DScene,				/* 3D Scene */
			* p3DScene;				/* pointer to 3D scene */
 
 
/* Function prototypes */
void loadHouseData(p3DScene scene);
void loadWallsData(p3DObject pObj);
void loadRoofData(p3DObject pObj);
p3DObjectGroup allocateObjGroupArray(int numObjGroups);
p3DObject allocateObjectArray(int numObjects);
p3DFacet allocateFacetArray(int numFacets);
Vertex3D * allocateVertexArray(int numVertices);
 
 
#endif /* _3D_DATASTRUCT_H */
DataStruct.c :
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/*  This function loads a specific scene (house) */
void loadHouseData(p3DScene pWorld ) {
	pWorld->numObjGroups = 2;
	if ( (pWorld->pObjGroupArray = allocateObjGroupArray(pWorld->numObjGroups)) == NULL ) {
		return;		/* improve */
	}
	else {
		pWorld->pObjGroupArray[0].numObjs = 1;	/* each object group has one object */
		pWorld->pObjGroupArray[1].numObjs = 1;
 
		if ( (pWorld->pObjGroupArray[0].pObjectArray = allocateObjectArray(pWorld->pObjGroupArray[0].numObjs)) == NULL )
			{
			return;		/* improve */
			}
		else if ( (pWorld->pObjGroupArray[1].pObjectArray = allocateObjectArray(pWorld->pObjGroupArray[1].numObjs)) == NULL )
			{
			return;		/* improve */
			}
 
		loadWallsData(&(pWorld->pObjGroupArray[0].pObjectArray[0]));	/* load walls data */
		loadRoofData(&(pWorld->pObjGroupArray[1].pObjectArray[0]));		/* load roof data */
		}
 
	return;
}
 
/*  This function loads wall data for a house */
 
void loadWallsData(p3DObject pWalls) {
	pWalls->numFacets = 8;
	if ( (pWalls->pFacetArray = allocateFacetArray(pWalls->numFacets)) == NULL ) {
		return;		/* improve */
	}
	else {
		pWalls->pFacetArray[0].f3SidedPoly[0] = 0;
		pWalls->pFacetArray[0].f3SidedPoly[1] = 1;
		pWalls->pFacetArray[0].f3SidedPoly[2] = 2;
		pWalls->pFacetArray[0].visible = 1;
 
		pWalls->pFacetArray[1].f3SidedPoly[0] = 0;
		pWalls->pFacetArray[1].f3SidedPoly[1] = 2;
		pWalls->pFacetArray[1].f3SidedPoly[2] = 3;
		pWalls->pFacetArray[1].visible = 1;
 
		pWalls->pFacetArray[2].f3SidedPoly[0] = 3;
		pWalls->pFacetArray[2].f3SidedPoly[1] = 2;
		pWalls->pFacetArray[2].f3SidedPoly[2] = 5;
		pWalls->pFacetArray[2].visible = 1;
 
		pWalls->pFacetArray[3].f3SidedPoly[0] = 3;
		pWalls->pFacetArray[3].f3SidedPoly[1] = 5;
		pWalls->pFacetArray[3].f3SidedPoly[2] = 4;
		pWalls->pFacetArray[3].visible = 1;
 
		pWalls->pFacetArray[4].f3SidedPoly[0] = 4;
		pWalls->pFacetArray[4].f3SidedPoly[1] = 5;
		pWalls->pFacetArray[4].f3SidedPoly[2] = 6;
		pWalls->pFacetArray[4].visible = 1;
 
		pWalls->pFacetArray[5].f3SidedPoly[0] = 4;
		pWalls->pFacetArray[5].f3SidedPoly[1] = 6;
		pWalls->pFacetArray[5].f3SidedPoly[2] = 7;
		pWalls->pFacetArray[5].visible = 1;
 
		pWalls->pFacetArray[6].f3SidedPoly[0] = 7;
		pWalls->pFacetArray[6].f3SidedPoly[1] = 1;
		pWalls->pFacetArray[6].f3SidedPoly[2] = 0;
		pWalls->pFacetArray[6].visible = 1;
 
		pWalls->pFacetArray[7].f3SidedPoly[0] = 7;
		pWalls->pFacetArray[7].f3SidedPoly[1] = 6;
		pWalls->pFacetArray[7].f3SidedPoly[2] = 1;
		pWalls->pFacetArray[7].visible = 1;
 
		}
	pWalls->numVertices = 8;
 
	if ( (pWalls->pVertexArray = allocateVertexArray(pWalls->numVertices)) == NULL ) {
		return;		/* improve */
	}
	else {
		pWalls->pVertexArray[0].x = 0; pWalls->pVertexArray[0].y = 1; pWalls->pVertexArray[0].z = 1;  
		pWalls->pVertexArray[1].x = 0; pWalls->pVertexArray[1].y = 0; pWalls->pVertexArray[1].z = 1;  
		pWalls->pVertexArray[2].x = 1; pWalls->pVertexArray[2].y = 0; pWalls->pVertexArray[2].z = 1;  
		pWalls->pVertexArray[3].x = 1; pWalls->pVertexArray[3].y = 1; pWalls->pVertexArray[3].z = 1;  
		pWalls->pVertexArray[4].x = 1; pWalls->pVertexArray[4].y = 1; pWalls->pVertexArray[4].z = 0;  
		pWalls->pVertexArray[5].x = 1; pWalls->pVertexArray[5].y = 0; pWalls->pVertexArray[5].z = 0;  
		pWalls->pVertexArray[6].x = 0; pWalls->pVertexArray[6].y = 0; pWalls->pVertexArray[6].z = 0;  
		pWalls->pVertexArray[7].x = 0; pWalls->pVertexArray[7].y = 1; pWalls->pVertexArray[7].z = 0;  
	}
	pWalls->worldPosition.x = 10, pWalls->worldPosition.y = 0, pWalls->worldPosition.z = 0;
	pWalls->xScale = pWalls->yScale = pWalls->zScale = 100; 
	pWalls->rotXAngle = pWalls->rotYAngle = pWalls->rotZAngle = 0;
 
	pWalls->colour.red = 128, pWalls->colour.green = 128, pWalls->colour.blue = 128;
 
	pWalls->visible = 1;
 
	return;
}
 
/*  This function loads roof data for a house */
 
void loadRoofData(p3DObject pRoof) {
	pRoof->numFacets = 6;
	if ( (pRoof->pFacetArray = allocateFacetArray(pRoof->numFacets)) == NULL ) {
		return;		/* improve */
	}
	else {
		pRoof->pFacetArray[0].f3SidedPoly[0] = 0;
		pRoof->pFacetArray[0].f3SidedPoly[1] = 1;
		pRoof->pFacetArray[0].f3SidedPoly[2] = 2;
		pRoof->pFacetArray[0].visible = 1;
 
		pRoof->pFacetArray[1].f3SidedPoly[0] = 0;
		pRoof->pFacetArray[1].f3SidedPoly[1] = 2;
		pRoof->pFacetArray[1].f3SidedPoly[2] = 3;
		pRoof->pFacetArray[1].visible = 1;
 
		pRoof->pFacetArray[2].f3SidedPoly[0] = 3;
		pRoof->pFacetArray[2].f3SidedPoly[1] = 2;
		pRoof->pFacetArray[2].f3SidedPoly[2] = 5;
		pRoof->pFacetArray[2].visible = 1;
 
		pRoof->pFacetArray[3].f3SidedPoly[0] = 3;
		pRoof->pFacetArray[3].f3SidedPoly[1] = 5;
		pRoof->pFacetArray[3].f3SidedPoly[2] = 4;
		pRoof->pFacetArray[3].visible = 1;
 
		pRoof->pFacetArray[4].f3SidedPoly[0] = 0;
		pRoof->pFacetArray[4].f3SidedPoly[1] = 3;
		pRoof->pFacetArray[4].f3SidedPoly[2] = 1;
		pRoof->pFacetArray[4].visible = 1;
 
		pRoof->pFacetArray[5].f3SidedPoly[0] = 1;
		pRoof->pFacetArray[5].f3SidedPoly[1] = 3;
		pRoof->pFacetArray[5].f3SidedPoly[2] = 4;
		pRoof->pFacetArray[5].visible = 1;
		}
 
	pRoof->numVertices = 6;
 
	if ( (pRoof->pVertexArray = allocateVertexArray(pRoof->numVertices)) == NULL ) {
		return;		/* improve */
	}
	else {
		pRoof->pVertexArray[0].x = 0.5; pRoof->pVertexArray[0].y = 1; pRoof->pVertexArray[0].z = 1;  
		pRoof->pVertexArray[1].x = 0; pRoof->pVertexArray[1].y = 0; pRoof->pVertexArray[1].z = 1;  
		pRoof->pVertexArray[2].x = 1; pRoof->pVertexArray[2].y = 0; pRoof->pVertexArray[2].z = 1;  
		pRoof->pVertexArray[3].x = 0.5; pRoof->pVertexArray[3].y = 1; pRoof->pVertexArray[3].z = 0;  
		pRoof->pVertexArray[4].x = 0; pRoof->pVertexArray[4].y = 0; pRoof->pVertexArray[4].z = 0;  
		pRoof->pVertexArray[5].x = 1; pRoof->pVertexArray[5].y = 0; pRoof->pVertexArray[5].z = 0;  
	}
 
 
	pRoof->worldPosition.x = 10, pRoof->worldPosition.y = 100, pRoof->worldPosition.z = 0;
	pRoof->xScale = pRoof->zScale = 100; 
	pRoof->yScale = 50; 
	pRoof->rotXAngle = pRoof->rotYAngle = pRoof->rotZAngle = 0;
 
	pRoof->colour.red = 128, pRoof->colour.green = 0, pRoof->colour.blue = 0;
 
	pRoof->visible = 1;
 
	return;
}
PS : je débute en 3D