根據(jù)OpenGL提供的直線，多邊形繪制算法（橡皮筋效果），實現(xiàn)基于鼠標(biāo)交互的卡通人物設(shè)計與繪制。使用顏色填充與反走樣技術(shù)對卡通人物外貌以及衣著進(jìn)行繪制。實現(xiàn)對卡通人物輪廓的交互控制，點擊鼠標(biāo)左鍵可以對人物五官位置進(jìn)行拖拽移動調(diào)整。按“↑”按鍵能夠?qū)崿F(xiàn)卡通人物繞坐標(biāo)原點（或指定點）進(jìn)行旋轉(zhuǎn)。
附加要求：選中其中的一個多邊形區(qū)域，點擊鼠標(biāo)右鍵，彈出一個菜單，可以對該區(qū)域進(jìn)行不同顏色的選擇。可以設(shè)計發(fā)型、衣服的模版，當(dāng)作文件進(jìn)行存儲，可以在窗口最右邊設(shè)計一個模板庫，顯示保存的發(fā)型與衣服，拖拽到卡通人物上可以為卡通人物進(jìn)行發(fā)型或者衣服的替換。
#include<iostream>
#include <windows.h>
#include <GL/glu.h>
#include <GL/gl.h>
#include <GL/glut.h>
#include <math.h>
#include <stdio.h>
using namespace std;
#define MAX_CHAR 128int window_width =
600;
int window_height =
400;
#define LEFT_EYE 1
#define RIGHT_EYE 2
#define LEFT_ARM 3
#define RIGHT_ARM 4
#define JU_PAI 5
#define MOUTH 6
#define HAIR 7
#define TIE 8#define BUFSIZE 512GLuint selectBuf[BUFSIZE];
const double PI =
3.1415926;
static GLenum mode = GL_RENDER;
BOOL leftEye_Selected;
BOOL rightEye_selected;
BOOL leftArm_Selected;
BOOL rightArm_Selected;
BOOL juPai_Selected;
BOOL mouth_Selected;
BOOL hair_Selected;
BOOL tie_Selected;
GLuint leftEye[
2] = { -
65,
50 };
GLuint rightEye[
2] = { -
135,
50 };
GLuint leftArm[
2] = { -
50,
0 };
GLuint rightArm[
2] = { -
150,
0 };
GLuint juPai[
2] = {
100,
50 };
GLuint mouth[
2] = { -
100,
60 };
GLuint hair[
2] = {
220,
150 };
GLuint tie[
2] = {
100,
150};
int body[
2] = { -
100,
50 };
static int theta =
0;
int selectedToChangeColor = -
1;
double lefteye_color[
3] = {
1.,
1.,
1. };
double righteye_color[
3] = {
1.,
1.,
1. };
double leftarm_color[
3] = {
1.,
1.,
1. };
double rightarm_color[
3] = {
1.,
1.,
1. };
double mouth_color[
3] = {
1,
0.8,
0 };
double jupai_color[
3] = {
1.,
1.,
1. };
double tie_color[
3] = {
1.0,
0.5,
0 };
double hair_color[
3] = {
0.8,
0.2,
0.8 };
double black[
3] = {
0.,
0.,
0. };
double pink[
3] = {
0.95,
0.62,
0.76 };
double yellowishbrown[
3] = {
1,
0.8,
0 };
double oranger[
3] = {
1.0,
0.5,
0 };
double brown[
3] = {
0.5,
0.25,
0.};
double purple[
3] = {
0.8,
0.2,
0.8 };
double white[
3] = {
1.0,
1.0,
1.0 };GLfloat fAspect;
void drawString(
const char* str) {
static int isFirstCall =
1;
static GLuint lists;
if (isFirstCall) { isFirstCall =
0;lists = glGenLists(MAX_CHAR);wglUseFontBitmaps(wglGetCurrentDC(),
0, MAX_CHAR, lists);}
for (; *str !=
'\0'; ++str)glCallList(lists + *str);
}
void drawCircle(
int N,
double radius,
int angleStart =
0,
int angleEnd =
360,
double x =
0,
double y=
0,
double s1=
1.,
double s2=
1.){glBegin(GL_POLYGON);
double start = (
double)angleStart /
360.0*N;
double end = (
double)angleEnd /
360 * N;
for (
int i = start; i <end+
1; i++){glVertex3f(x+s1*
cos(i *
2 * PI / N)*radius,y+ s2*
sin(i *
2 * PI / N) *radius,
0.5);}glEnd();
}
void drawCircle2(
int N,
double radius,
int angleStart =
0,
int angleEnd =
360,
int x =
0,
int y =
0,
double s1 =
1.,
double s2 =
1.){glLineWidth(
0.6);glBegin(GL_LINE_STRIP);
double start = (
double)angleStart /
360.0*N;
double end = (
double)angleEnd /
360 * N;
for (
int i = start; i <end+
1; i++){glVertex3f(x+s1*
cos(i *
2 * PI / N)*radius,y + s2*
sin(i *
2 * PI / N) *radius,
0.5);}glEnd();
}
void drawLeftEye(
int x,
int y){glLoadIdentity();glTranslatef(body[
0], body[
1],
0);glRotatef(theta,
0,
0,
1);glTranslatef(-body[
0], -body[
1],
0);glColor3f(
0.0f,
0.0f,
0.0f);glBegin(GL_LINES);glVertex3f(x+
0,y+
10,
0.5);glVertex3f(x+
0, y+
15,
0.5);glVertex3f(x+
5,y +
5*
sqrt(
3),
0.5);glVertex3f(x+
10, y+
13,
0.5);glVertex3f(x-
5, y+
5 *
sqrt(
3),
0.5);glVertex3f(x-
10,y+
13,
0.5);glEnd();drawCircle2(
100,
10,
0,
360,x,y);drawCircle(
20,
2,
0,
360,x,y);glColor3f(lefteye_color[
0], lefteye_color[
1], lefteye_color[
2]);drawCircle(
20,
10,
0,
360, x, y);
}
void drawRightEye(
int x,
int y){glLoadIdentity();glTranslatef(body[
0], body[
1],
0);glRotatef(theta,
0,
0,
1);glTranslatef(-body[
0], -body[
1],
0);glColor3f(
0.0f,
0.0f,
0.0f);glColor3f(
0.0f,
0.0f,
0.0f);glBegin(GL_LINES);glVertex3f(x+
0,y+
10,
0.5);glVertex3f(x+
0, y+
15,
0.5);glVertex3f(x+
5,y+
5 *
sqrt(
3),
0.5);glVertex3f(x+
10, y+
13,
0.5);glVertex3f(x-
5, y+
5 *
sqrt(
3),
0.5);glVertex3f(x-
10, y+
13,
0.5);glEnd();drawCircle2(
100,
10,
0,
360,x,y);drawCircle(
20,
2,
0,
360, x, y);glColor3f(righteye_color[
0], righteye_color[
1], righteye_color[
2]);drawCircle(
20,
10,
0,
360, x, y);}
void drawMouth(
int x,
int y){glLoadIdentity();glTranslatef(body[
0], body[
1],
0);glRotatef(theta,
0,
0,
1);glTranslatef(-body[
0], -body[
1],
0);glColor3f(
0,
0,
0);drawCircle2(
50,
40,
235,
305,x, y);glColor3f(mouth_color[
0], mouth_color[
1], mouth_color[
2]);drawCircle(
50,
40,
235,
305,x,y);glColor3f(
0,
0,
0);drawCircle2(
50,
40,
55,
125,x,y-
61);glColor3f(mouth_color[
0], mouth_color[
1], mouth_color[
2]);drawCircle(
50,
40,
55,
125,x,y-
61);glColor3f(
0,
0,
0);glBegin(GL_LINES);glVertex3f(x-
25,y-
31,
0.5);glVertex3f(x+
25, y-
31,
0.5);glEnd();}
void drawHeadandBody(
int x,
int y){glLoadIdentity();glTranslatef(body[
0], body[
1],
0);glRotatef(theta,
0,
0,
1);glTranslatef(-body[
0], -body[
1],
0);glColor3f(
0,
0,
0);drawCircle2(
50,
60,
0,
180,x,y);glBegin(GL_LINE_STRIP);glVertex3f(x+
60, y,
0.5f);glVertex3f(x+
65, y-
150,
0.5f);glVertex3f(x-
65, y-
150,
0.5f);glVertex3f(x-
60, y,
0.5f);glEnd();glColor3f(
1.0f,
1.0f,
1.0f);drawCircle(
50,
60,
0,
360,x,y);glBegin(GL_POLYGON);glVertex3f(x+
60,y,
0.5f);glVertex3f(x-
60, y,
0.5f);glVertex3f(x-
65,y-
150,
0.5f);glVertex3f(x+
65, y-
150,
0.5f);glEnd();
}
void drawLeftArm(
int x,
int y){glLoadIdentity();glTranslatef(body[
0], body[
1],
0);glRotatef(theta,
0,
0,
1);glTranslatef(-body[
0],-body[
1],
0);glTranslatef(x,y,
0);glRotatef(
30,
0,
0,
1);glTranslatef(-x,-y,
0);glColor3f(
1,
1,
1);drawCircle(
50,
50,
180,
360,x,y,
0.25);glColor3f(
0,
0,
0);drawCircle2(
50,
50,
180,
360,x,y,
0.23);drawCircle2(
50,
50,
180,
360, x, y,
0.24);drawCircle2(
50,
50,
180,
360, x, y,
0.25);drawCircle2(
50,
50,
180,
360, x, y,
0.26);}
void drawRightArm(
int x,
int y){glLoadIdentity();glTranslatef(body[
0], body[
1],
0);glRotatef(theta,
0,
0,
1);glTranslatef(-body[
0], -body[
1],
0);glTranslatef(x, y,
0);glRotatef(-
30,
0,
0,
1);glTranslatef(-x, -y,
0);glColor3f(
1,
1,
1);drawCircle(
50,
50,
180,
360, x, y,
0.25);glColor3f(
0,
0,
0);drawCircle2(
50,
50,
180,
360, x, y,
0.23);drawCircle2(
50,
50,
180,
360, x, y,
0.24);drawCircle2(
50,
50,
180,
360, x, y,
0.25);drawCircle2(
50,
50,
180,
360, x, y,
0.26);}
void drawTie(
int x,
int y){glLoadIdentity();glTranslatef(x, y,
0);glRotatef(theta,
0,
0,
1);glTranslatef(-x, -y,
0);glTranslatef(x,y,
0);glColor3f(tie_color[
0],tie_color[
1],tie_color[
2]);glBegin(GL_POLYGON);glVertex3f(-
9,
2,
0.5);glVertex3f(-
9, -
2,
0.5);glVertex3f(
9, -
2,
0.5);glVertex3f(
9,
2,
0.5);glEnd();glColor3f(
0,
0,
0);drawCircle2(
20,
10);glColor3f(
1,
0.8,
0);drawCircle(
20,
10);glTranslatef(
0,
5,
0);glColor3f(tie_color[
0], tie_color[
1], tie_color[
2]);glBegin(GL_POLYGON);glVertex3f(-
60,
0,
0.5);glVertex3f(-
60,-
10,
0.5);glVertex3f(
60, -
10,
0.5);glVertex3f(
60,
0,
0.5);glEnd();}
void drawJuPai(
int x,
int y){glLoadIdentity();glTranslatef(x, y,
0);glRotatef(theta,
0,
0,
1);glTranslatef(-x, -y,
0);glTranslatef(x, y,
0);glColor3f(
0,
0,
0);glBegin(GL_LINE_STRIP);glVertex3f(-
30,
20,
0.5);glVertex3f(-
30, -
20,
0.5);glVertex3f(
30, -
20,
0.5);glVertex3f(
30,
20,
0.5);glEnd();glBegin(GL_LINE_STRIP);glVertex3f(-
5, -
20,
0.5);glVertex3f(-
5, -
50,
0.5);glVertex3f(
5, -
50,
0.5);glVertex3f(
5, -
20,
0.5);glEnd();glColor3f(jupai_color[
0], jupai_color[
1], jupai_color[
2]);glBegin(GL_POLYGON);glVertex3f(-
30,
20,
0.5);glVertex3f(-
30, -
20,
0.5);glVertex3f(
30, -
20,
0.5);glVertex3f(
30,
20,
0.5);glEnd();glBegin(GL_POLYGON);glVertex3f(-
5, -
20,
0.5);glVertex3f(-
5, -
50,
0.5);glVertex3f(
5, -
50,
0.5);glVertex3f(
5, -
20,
0.5);glEnd();glTranslatef(-
40,-
70,
0);glRotatef(
120,
0,
0,
1);glScalef(
0.25,
1,
1);glColor3f(
1,
1,
1);drawCircle(
100,
50,
180,
360);glColor3f(
0,
0,
0);drawCircle2(
100,
50,
180,
360);}
void drawMoxigan(
int x,
int y){glLoadIdentity();glTranslatef(x, y,
0);glRotatef(theta,
0,
0,
1);glTranslatef(-x, -y,
0);glTranslatef(x,y,
0);glRotatef(-
50,
0,
0,
1);glColor3f(hair_color[
0],hair_color[
1],hair_color[
2]);drawCircle(
50,
50,
0,
90);glTranslatef(
50,
0,
0);glRotatef(
30,
0,
0,
1);glTranslatef(-
50,
0,
0);drawCircle(
50,
50,
0,
90);glTranslatef(
50,
0,
0);glRotatef(
30,
0,
0,
1);glTranslatef(-
50,
0,
0);drawCircle(
50,
50,
0,
90);
}
void drawClothes(
int x,
int y){}
void myDisplay()
{
if (mode==GL_SELECT)glPushName(TIE);drawTie(tie[
0], tie[
1]);
if (mode == GL_SELECT)glPushName(JU_PAI);drawJuPai(juPai[
0],juPai[
1]);
if (mode == GL_SELECT)glPushName(HAIR);drawMoxigan(hair[
0], hair[
1]);glColor3f(
1.0f,
1.0f,
1.0f);
if (mode == GL_SELECT)glPushName(RIGHT_ARM);drawRightArm(rightArm[
0], rightArm[
1]);
if (mode == GL_SELECT)glPushName(LEFT_ARM);drawLeftArm(leftArm[
0], leftArm[
1]);
if (mode == GL_SELECT)glPushName(MOUTH);drawMouth(mouth[
0],mouth[
1]);
if (mode == GL_SELECT)glPushName(LEFT_EYE);drawLeftEye(leftEye[
0],leftEye[
1]);
if (mode == GL_SELECT)glPushName(RIGHT_EYE);drawRightEye(rightEye[
0],rightEye[
1]);
if (mode == GL_SELECT)glPushName(-
1);drawHeadandBody(body[
0],body[
1]);glPopMatrix();}
void testDisplay(){glColor3f(
1.0,
0.0,
0.0);
if (mode == GL_SELECT)glLoadName(
100);glPushMatrix();glBegin(GL_QUADS);glVertex3f(-
0.1,
0,
0);glVertex3f(
0.1,
0,
0);glVertex3f(
0.1,
0.1,
0);glVertex3f(-
0.1,
0.1,
0);glEnd();glPopMatrix();
}
void judegSectedObject(
int x,
int y){glClear(GL_COLOR_BUFFER_BIT);GLint hits, viewport[
4];glGetIntegerv(GL_VIEWPORT, viewport); glSelectBuffer(BUFSIZE, selectBuf); mode = GL_SELECT;glRenderMode(mode); glInitNames();glMatrixMode(GL_PROJECTION);glPushMatrix();glLoadIdentity();gluPickMatrix(x, viewport[
3]-y,
1,
1,viewport);glOrtho(-
300,
300, -
200,
200, -
10,
10);glMatrixMode(GL_MODELVIEW);glLoadIdentity(); myDisplay();glMatrixMode(GL_PROJECTION);glPopMatrix(); mode = GL_RENDER;hits = glRenderMode(mode);
cout << hits;
if (hits >
0){GLuint name, *ptr;ptr = selectBuf;
int selected_num =
0;
for (
int i =
0; i < hits; i++){name = *ptr;ptr +=
3;ptr += name -
1;
cout << i <<
":" << *ptr << endl;BOOL timeToBreak =
false;
if (selected_num ==
0){
switch (*ptr){
case LEFT_EYE:
cout <<
"left eye" << endl;leftEye_Selected =
true;selectedToChangeColor = LEFT_EYE;selected_num++;
break;
case RIGHT_EYE:rightEye_selected =
true;selectedToChangeColor = RIGHT_EYE;selected_num++;
cout <<
"right eye" << selected_num << endl;
break;
case TIE:
cout <<
"tie" << endl;tie_Selected =
true;selectedToChangeColor = TIE;selected_num++;
break;
case JU_PAI:
cout <<
"jupai" << endl;juPai_Selected =
true;selectedToChangeColor = JU_PAI;selected_num++;
break;
case HAIR:
cout <<
"hair" << endl;hair_Selected =
true;selectedToChangeColor = HAIR;selected_num++;
break;
case LEFT_ARM:
cout <<
"left arm" << endl;leftArm_Selected =
true;selected_num++;
break;
case RIGHT_ARM:
cout <<
"right arm" << endl;rightArm_Selected =
true;selected_num++;
break;
case MOUTH:
cout <<
"mouth" << endl;mouth_Selected =
true;selectedToChangeColor = MOUTH;selected_num++;
break;
default:timeToBreak =
false;
break;}}}}glMatrixMode(GL_MODELVIEW);}
void mouseClick(
int btn,
int state,
int x,
int y){
if (btn == GLUT_LEFT_BUTTON&&state == GLUT_DOWN){
std::
cout <<
"鼠標(biāo)落下：" << x <<
"," << y <<
std::endl;judegSectedObject(x, y);}
if (btn == GLUT_LEFT_BUTTON&&state == GLUT_UP){
std::
cout <<
"鼠標(biāo)抬起：" << x <<
"," << y <<
std::endl;leftEye_Selected =
false;rightEye_selected =
false;leftArm_Selected =
false;rightArm_Selected =
false;juPai_Selected =
false;mouth_Selected =
false;hair_Selected =
false;tie_Selected =
false;}
}
void init(){glEnable(GL_POINT_SMOOTH);glEnable(GL_LINE_SMOOTH);glHint(GL_POINT_SMOOTH_HINT, GL_NICEST); glHint(GL_LINE_SMOOTH_HINT, GL_NICEST); glEnable(GL_BLEND);glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);leftEye_Selected =
false;rightEye_selected =
false;leftArm_Selected =
false;rightArm_Selected =
false;juPai_Selected =
false;mouth_Selected =
false;hair_Selected =
false;tie_Selected =
false;glEnable(GL_DEPTH_TEST);glClearColor(
0.5,
0.5,
0.5,
1);glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
void display(){glMatrixMode(GL_PROJECTION);glPushMatrix();glLoadIdentity();glOrtho(-
300,
300, -
200,
200, -
10,
10);glMatrixMode(GL_MODELVIEW);myDisplay();glutSwapBuffers();
}
void upToRotate(
int key,
int x,
int y){
if (key == GLUT_KEY_UP){theta +=
10;glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);display();}
if (key == GLUT_KEY_DOWN){theta -=
10;glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);display();}}
void mouseDrag(
int x,
int y){
std::
cout <<
"鼠標(biāo)拖動：" << x <<
"," << y <<
std::endl;
if (leftEye_Selected){leftEye[
0] = x - window_width /
2;leftEye[
1] = window_height /
2 - y;}
if (rightEye_selected){rightEye[
0] = x - window_width /
2;rightEye[
1] = window_height /
2 - y;}
if (leftArm_Selected){leftArm[
0] = x - window_width /
2;leftArm[
1] = window_height /
2 - y;}
if (rightArm_Selected){rightArm[
0] = x - window_width /
2;rightArm[
1] = window_height /
2 - y;}
if (juPai_Selected){juPai[
0] = x - window_width /
2;juPai[
1] = window_height /
2 - y;}
if (mouth_Selected){mouth[
0] = x - window_width /
2;mouth[
1] = window_height /
2 - y +
25;}
if (hair_Selected){hair[
0] = x - window_width /
2;hair[
1] = window_height /
2 - y;}
if (tie_Selected){tie[
0] = x - window_width /
2;tie[
1] = window_height/
2 - y;}glClear(GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT);display();
}
void menu(
int index){
double color[
3] = {
0.,
0.,
0. };
switch (index){
case 0:color[
0] = black[
0];color[
1] = black[
1];color[
2] = black[
2];
break;
case 1:color[
0] = pink[
0];color[
1] = pink[
1];color[
2] = pink[
2];
break;
case 2:color[
0] = yellowishbrown[
0];color[
1] = yellowishbrown[
1];color[
2] = yellowishbrown[
2];
break;
case 3:color[
0] = oranger[
0];color[
1] = oranger[
1];color[
2] = oranger[
2];
break;
case 4:color[
0] = brown[
0];color[
1] = brown[
1];color[
2] = brown[
2];
break;
case 5:color[
0] = purple[
0];color[
1] = purple[
1];color[
2] = purple[
2];
break;
case 6:color[
0] = white[
0];color[
1] = white[
1];color[
2] = white[
2];
break;
default:
break;}
switch (selectedToChangeColor){
case LEFT_EYE:
cout <<
"zuoyan yanse " << index << endl;lefteye_color[
0] = color[
0];lefteye_color[
1] = color[
1];lefteye_color[
2] = color[
2];
break;
case RIGHT_EYE:
cout <<
"youyan yanse " << index << endl;righteye_color[
0] = color[
0];righteye_color[
1] = color[
1];righteye_color[
2] = color[
2];
break;
case LEFT_ARM:leftarm_color[
0] = color[
0];leftarm_color[
1] = color[
1];leftarm_color[
2] = color[
2];
break;
case RIGHT_ARM:rightarm_color[
0] = color[
0];rightarm_color[
1] = color[
1];rightarm_color[
2] = color[
2];
break;
case MOUTH:mouth_color[
0] = color[
0];mouth_color[
1] = color[
1];mouth_color[
2] = color[
2];
break;
case JU_PAI:jupai_color[
0] = color[
0];jupai_color[
1] = color[
1];jupai_color[
2] = color[
2];
break;
case HAIR:hair_color[
0] = color[
0];hair_color[
1] = color[
1];hair_color[
2] = color[
2];
break;
case TIE:tie_color[
0] = color[
0];tie_color[
1] = color[
1];tie_color[
2] = color[
2];
break;
default:
break;}glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);display();
}
void ChangeSize(
int w,
int h)
{window_width = w;window_height = h;
if (h ==
0) h =
1;glViewport(
0,
0, w, h);fAspect = (GLfloat)w / (GLfloat)h;glMatrixMode(GL_PROJECTION);glLoadIdentity();
if (w <= h){glOrtho(-
300,
300, -
200 * fAspect,
200 * fAspect, -
10,
10);}
else{glOrtho(-
300 * fAspect,
300 * fAspect, -
200,
200, -
10,
10);}glMatrixMode(GL_MODELVIEW);glLoadIdentity();}
int main(
int argc,
char* argv[]){glutInit(&argc, argv);glutInitDisplayMode(GLUT_DOUBLE| GLUT_RGB | GLUT_DEPTH);glutInitWindowSize(window_width,window_height);glutCreateWindow(
"伊麗莎白");init();glutReshapeFunc(ChangeSize);glutDisplayFunc(display);glutMouseFunc(mouseClick);glutMotionFunc(mouseDrag);glutSpecialFunc(upToRotate);glutCreateMenu(menu);glutAddMenuEntry(
"黑色",
0);glutAddMenuEntry(
"粉色",
1);glutAddMenuEntry(
"土黃色",
2);glutAddMenuEntry(
"橙色",
3);glutAddMenuEntry(
"棕色",
4);glutAddMenuEntry(
"紫色",
5);glutAddMenuEntry(
"白色",
6);glutAttachMenu(GLUT_RIGHT_BUTTON);glutMainLoop();
return 0;
}
運行效果：
總結(jié)
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