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分享求opengl方面的开发人员，给我点帮助？
目前从事vc(MFC)+opengl开发，需要用到交互画几何图形，比如在view下，用鼠标单击拖动，任意画个几何图形，请问如何实现？给一点示例代码。
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源代码大师 2021-05-12
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希望对您有帮助，盼采纳：https://blog.csdn.net/it_xiangqiang/category_10898660.html
草履虫程序员 2021-04-21
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没错，属于简单的计算机辅助设计小工具。
superdai 2021-04-21
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那你这个就是要做编辑器啊，类似3dmax之类。知识点不一样
草履虫程序员 2021-04-18
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这个我可以查手册，主要是想给个交互的例子。
schlafenhamster 2021-04-17
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有些是有大小参数的如
void auxSolidSphere (GLdouble radius)// 实形球 （半径）
草履虫程序员 2021-04-16
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你这是固定画几何图形的么？
schlafenhamster 2021-04-15
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//SHAPES.C
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include "3d.h"
#define SPHEREWIRE 0
#define CUBEWIRE 1
#define BOXWIRE 2
#define TORUSWIRE 3
#define CYLINDERWIRE 4
#define ICOSAWIRE 5
#define OCTAWIRE 6
#define TETRAWIRE 7
#define DODECAWIRE 8
#define CONEWIRE 9
#define SPHERESOLID 10
#define CUBESOLID 11
#define BOXSOLID 12
#define TORUSSOLID 13
#define CYLINDERSOLID 14
#define ICOSASOLID 15
#define OCTASOLID 16
#define TETRASOLID 17
#define DODECASOLID 18
#define CONESOLID 19
#define PI ((GLdouble)3.1415926535897)
GLuint findList (int index, GLdouble *paramArray, int size);
int compareParams (GLdouble *oneArray, GLdouble *twoArray,int size);
GLuint makeModelPtr (int index, GLdouble *sizeArray, int count);
void drawbox(GLdouble, GLdouble, GLdouble,GLdouble, GLdouble, GLdouble, GLenum);
void doughnut(GLdouble, GLdouble, GLint, GLint, GLenum);
void icosahedron(GLdouble *,GLdouble, GLenum);
void octahedron(GLdouble *, GLdouble, GLenum);
void tetrahedron(GLdouble *, GLdouble, GLenum);
void subdivide(int,GLdouble *,GLdouble *,GLdouble *,GLdouble *,GLdouble,GLenum,int);
void drawtriangle(int, int, int,GLdouble *,GLdouble,GLenum,int);
void recorditem(GLdouble *, GLdouble *, GLdouble *, GLdouble *, GLdouble, GLenum, int);
void initdodec(void);
void dodecahedron(GLdouble *, GLdouble, GLenum);
void pentagon(int, int, int, int, int, GLenum);
/* structure for each geometric object */
typedef struct model
{
GLuint list; /* display list to render object */
struct model *ptr; /* pointer to next object */
int numParam; /* # of parameters */
GLdouble *params; /* array with parameters */
} MODEL, *MODELPTR;
/* array of linked lists--used to keep track of display lists
* for each different type of geometric object. */
static MODELPTR lists[25] = {0};
//
void auxWireSphere (GLdouble radius)
{
GLUquadricObj *quadObj;
GLdouble *sizeArray;
GLuint displayList;
sizeArray = (GLdouble *)malloc(sizeof (GLdouble) * 1);
*sizeArray = radius;
displayList = findList (SPHEREWIRE, sizeArray, 1);
if (displayList == 0)
{
glNewList(makeModelPtr (SPHEREWIRE, sizeArray, 1),GL_COMPILE_AND_EXECUTE);
quadObj = gluNewQuadric ();
gluQuadricDrawStyle (quadObj, GLU_LINE);
gluSphere (quadObj, radius, 16, 16);
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
//
void auxSolidSphere (GLdouble radius)
{
GLUquadricObj *quadObj;
GLdouble *sizeArray;
GLuint displayList;
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
*sizeArray = radius;
displayList = findList (SPHERESOLID, sizeArray, 1);
if (displayList == 0)
{
glNewList(makeModelPtr (SPHERESOLID, sizeArray, 1),GL_COMPILE_AND_EXECUTE);
quadObj = gluNewQuadric ();
gluQuadricDrawStyle (quadObj, GLU_FILL);
gluQuadricNormals (quadObj, GLU_SMOOTH);
gluSphere (quadObj, radius, 16, 16);
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
/* Render wire frame or solid cube. If no display list with
* the current model size exists, create a new display list.
*/
void auxWireCube (GLdouble size)
{
GLdouble *sizeArray;
GLuint displayList;
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
*sizeArray = size;
displayList = findList (CUBEWIRE, sizeArray, 1);
if (displayList == 0)
{
glNewList(makeModelPtr (CUBEWIRE, sizeArray, 1), GL_COMPILE_AND_EXECUTE);// ListMode
drawbox(-size/(GLdouble)2.,size/(GLdouble)2., -size/(GLdouble)2., size/(GLdouble)2.,
-size/(GLdouble)2.,size/(GLdouble)2.,GL_LINE_LOOP);
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
//
void auxSolidCube (GLdouble size)
{
GLdouble *sizeArray;
GLuint displayList;
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
*sizeArray = size;
displayList = findList (CUBESOLID, sizeArray, 1);
if (displayList == 0)
{
glNewList(makeModelPtr (CUBESOLID, sizeArray, 1), GL_COMPILE_AND_EXECUTE);
drawbox(-size/(GLdouble)2.,size/(GLdouble)2.,-size/(GLdouble)2.,size/(GLdouble)2.,-size/(GLdouble)2.,size/(GLdouble)2.,GL_QUADS);
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
/* Render wire frame or solid cube. If no display list with
* the current model size exists, create a new display list.
*/
void auxWireBox (GLdouble width, GLdouble height, GLdouble depth)
{
GLdouble *sizeArray, *tmp;
GLuint displayList;
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 3);
tmp = sizeArray;
*tmp++ = width;
*tmp++ = height;
*tmp++ = depth;
displayList = findList (BOXWIRE, sizeArray, 3);
if (displayList == 0)
{
glNewList(makeModelPtr (BOXWIRE, sizeArray, 3),GL_COMPILE_AND_EXECUTE);
drawbox(-width/(GLdouble)2., width/(GLdouble)2., -height/(GLdouble)2., height/(GLdouble)2.,-depth/(GLdouble)2., depth/(GLdouble)2., GL_LINE_LOOP);
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
//
void auxSolidBox (GLdouble width, GLdouble height, GLdouble depth)
{
GLdouble *sizeArray, *tmp;
GLuint displayList;
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 3);
tmp = sizeArray;
*tmp++ = width;
*tmp++ = height;
*tmp++ = depth;
displayList = findList (BOXSOLID, sizeArray, 3);
if (displayList == 0)
{
glNewList(makeModelPtr (BOXSOLID, sizeArray, 3), GL_COMPILE_AND_EXECUTE);
drawbox(-width/(GLdouble)2., width/(GLdouble)2., -height/(GLdouble)2.,height/(GLdouble)2., -depth/(GLdouble)2., depth/(GLdouble)2., GL_QUADS);
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
/* Render wire frame or solid tori. If no display list with
* the current model size exists, create a new display list.
*/
void auxWireTorus (GLdouble innerRadius, GLdouble outerRadius)
{
GLdouble *sizeArray, *tmp;
GLuint displayList;
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
tmp = sizeArray;
*tmp++ = innerRadius;
*tmp++ = outerRadius;
displayList = findList (TORUSWIRE, sizeArray, 2);
if (displayList == 0)
{
glNewList(makeModelPtr (TORUSWIRE, sizeArray, 2), GL_COMPILE_AND_EXECUTE);
doughnut(innerRadius, outerRadius, 5, 10, GL_LINE_LOOP);
glEndList(); }
else
{
glCallList(displayList);
free (sizeArray);
}
}
//
void auxSolidTorus (GLdouble innerRadius, GLdouble outerRadius)
{
GLdouble *sizeArray, *tmp;
GLuint displayList;
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
tmp = sizeArray;
*tmp++ = innerRadius;
*tmp++ = outerRadius;
displayList = findList (TORUSSOLID, sizeArray, 2);
if (displayList == 0)
{
glNewList(makeModelPtr (TORUSSOLID, sizeArray, 2), GL_COMPILE_AND_EXECUTE);
doughnut(innerRadius, outerRadius, 8, 15, GL_QUADS);
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
/* Render wire frame or solid cylinders. If no display list with
* the current model size exists, create a new display list.
*/
void auxWireCylinder (GLdouble radius, GLdouble height)
{
GLUquadricObj *quadObj;
GLdouble *sizeArray, *tmp;
GLuint displayList;
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
tmp = sizeArray;
*tmp++ = radius;
*tmp++ = height;
displayList = findList (CYLINDERWIRE, sizeArray, 2);
if (displayList == 0)
{
glNewList(makeModelPtr (CYLINDERWIRE, sizeArray, 2),GL_COMPILE_AND_EXECUTE);
glPushMatrix ();
glRotatef ((GLfloat)90.0, (GLfloat)1.0, (GLfloat)0.0, (GLfloat)0.0);
// glTranslatef ((GLfloat)0.0, (GLfloat)0.0, (GLfloat)-1.0);//y ^
quadObj = gluNewQuadric ();
gluQuadricDrawStyle (quadObj,GLU_LINE);
gluCylinder (quadObj, radius, radius, height, 12, 2);
glPopMatrix ();
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
//
void auxSolidCylinder (GLdouble radius, GLdouble height)
{
GLUquadricObj *quadObj;
GLdouble *sizeArray, *tmp;
GLuint displayList;
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 2);
tmp = sizeArray;
*tmp++ = radius;
*tmp++ = height;
displayList = findList (CYLINDERWIRE, sizeArray, 2);
if (displayList == 0)
{
glNewList(makeModelPtr (CYLINDERWIRE, sizeArray, 2),GL_COMPILE_AND_EXECUTE);
glPushMatrix ();
glRotatef((GLfloat)90.0, (GLfloat)1.0, (GLfloat)0.0, (GLfloat)0.0);
glTranslatef ((GLfloat)0.0, (GLfloat)0.0, (GLfloat)-1.0);
quadObj = gluNewQuadric ();
gluQuadricDrawStyle (quadObj, GLU_FILL);
gluQuadricNormals (quadObj, GLU_SMOOTH);
gluCylinder (quadObj, radius, radius, height, 12, 2);
glPopMatrix ();
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
/* Render wire frame or solid icosahedra. If no display list with
* the current model size exists, create a new display list.
*/
void auxWireIcosahedron (GLdouble radius)
{
GLdouble *sizeArray;
GLuint displayList;
GLdouble center[3] = {(GLdouble)0.0, (GLdouble)0.0, (GLdouble)0.0};
sizeArray = (GLdouble *) malloc (sizeof (GLdouble) * 1);
*sizeArray = radius;
displayList = findList (ICOSAWIRE, sizeArray, 1);
if (displayList == 0)
{
glNewList(makeModelPtr(ICOSAWIRE, sizeArray, 1),GL_COMPILE_AND_EXECUTE);
icosahedron (center, radius, GL_LINE_LOOP);
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
//
void auxSolidIcosahedron (GLdouble radius)
{
GLdouble *sizeArray;
GLuint displayList;
GLdouble center[3] = {(GLdouble)0.0, (GLdouble)0.0, (GLdouble)0.0};
sizeArray = (GLdouble *)malloc (sizeof (GLdouble) * 1);
*sizeArray = radius;
displayList = findList (ICOSASOLID, sizeArray, 1);
if (displayList == 0)
{
glNewList(makeModelPtr (ICOSASOLID, sizeArray, 1),GL_COMPILE_AND_EXECUTE);
icosahedron (center, radius,GL_TRIANGLES);
glEndList();
}
else
{
glCallList(displayList);
free (sizeArray);
}
}
/* Render wire frame or solid octahedra. If no display list with
* the current model size exists, create a new display list.
*/
void auxWireOctahedron (GLdouble radius)
{
GLdouble *sizeArray;
GLuint displayList;
草履虫程序员 2021-04-15
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qt开发的吗？
草履虫程序员 2021-04-14
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2d的你有例子吗？学习下。
丁劲犇 2021-04-14
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没搞过。不过，应该和2D差不多。记录鼠标按键按下的位置。跟踪鼠标移动并刷新一些效果，在鼠标释放时创建对象。
丁劲犇 2021-04-14
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https://github.com/ArsMasiuk/qvge
