Y15

WEEK15

week15-1 攝影機

調整方向 視角 並使用攝影機

去jsyeh.org下載wundows~data.zip 執行projection.exe

eye center會決定攝影機主線 角度的話靠up

week1-2 

glutLookAt()的last後三個參數是up向量

eye center會決定攝影機輔助 

eye射向center 要攝影機照著軸線再360度旋轉 由up向量決定 有9個參數即可決定攝影機的拍攝方式

week1-3

ginPerspective參數是縮寫 (fov=field of viesw) (fovy有y方向的fov)

fov角度越大 東西越小

aspeo aspect ratio長寬比

長寬取決aspect的值

zNear zFsr->z方向近遠各切一刀 決定他投影到哪個方塊

fovy:field of view(y方向視野的角度)

aspect:aspect ratio長寬比

week2-1

gluPerspective()參數 從glut專案找 有resize()寒士裡面有glFrustum()函式來設左右上下左右前後邊界 成透視投影的矩陣

開glut專案 用git把github倉庫clone複製 所以2023graphicsa已有freeglut可以用

week2-2

glMatrixMode(GL_PROJECTION);

glLoadIdentity();                  切換

還原成單位矩陣

glOrtho(-ar*3, ar*3, -1*3, 1*3, -100, +100)=>把frustum註解，去執行之後視角會更正面

                                           

cd desktop 

git clone http://github.com/yang91127/2023graphicsa

cd 2023graphicsa

start.

git status

git add

git 

git clone 

--user.name yang91127

--user,.email 10160916@ms1.mcu.edu.tw

git push

week15-3

切換不同的關節和角度

int angle[20] angle[0] angle[1]用這些來旋轉

motion() angle[ID]來改

TRT_keyboard_mouse要用keyboard_mouse來操作

原來的keyboard註解先不用  一開始的檔案沒有NULL 

WEEK15-3-2

讓原來的eyboard先註解 擺不同動作

FILE*fout=NULL;

FILE*fin=NULL;

float teapotX=0,teapotY=0;

float angle[20]={}; 變成陣列

void display();

總程式:

#include <stdio.h>
	#include <GL/glut.h>
	#include "glm.h"
	GLMmodel * head = NULL;
	GLMmodel * body = NULL;
	GLMmodel * uparmR = NULL;
	GLMmodel * lowarmR = NULL;
	int show[4] = {1,1,1,1};///用show[i] 來決定要不要顯示
	int ID=3;///0:頭 1:身體 2:上手臂 3:下手臂
	FILE * fout = NULL;///一開始檔案沒有開，NULL
	FILE * fin = NULL;///要讀檔案用的指標，一開始也是NULL
	float teapotX=0,teapotY=0;
	///float angle=0,angle2=0,angle3=0;
	float angle[20] = {};
	///NULL空指標
	void keyboard(unsigned char key,int x,int y)
	{
	if(key=='0') ID=0;
	if(key=='1') ID=1;
	if(key=='2') ID=2;
	if(key=='3') ID=3;
	if(key=='s'){
	if(fout==NULL) fout = fopen("motion.txt","w");
	for(int i=0;i<20;i++){
	fprintf(fout,"%.2f ",angle[i]);
	}
	fprintf(fout,"\n");
	}else if(key=='r'){
	if(fin==NULL) fin = fopen("motion.txt","r");
	for(int i=0;i<20;i++){
	fscanf(fin,"%f",&angle[i]);
	}
	glutPostRedisplay();
	}
	glutPostRedisplay();
	}
	void display()
	{
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
	glPushMatrix();
	glScalef(0.2,0.2,0.2);
	if(body==NULL){
	head =glmReadOBJ("model/head.obj");
	body =glmReadOBJ("model/body.obj");
	uparmR =glmReadOBJ("model/uparmR.obj");
	lowarmR =glmReadOBJ("model/lowarmR.obj");
	}
	if(ID==0) glColor3f(1,0,0);///選定的，設紅色
	else glColor3f(1,1,1);///沒選定的，設白色
	if(show[0]) glmDraw(head,GLM_MATERIAL);
	if(ID==1) glColor3f(1,0,0);
	else glColor3f(1,1,1);
	if(show[1]) glmDraw(body,GLM_MATERIAL);
	glPushMatrix();
	glTranslatef(-1.366666,+0.573333,0);///建立T-R-T
	glRotatef(angle[2],0,0,1);///建立T-R-T
	glTranslatef(1.366666,-0.573333,0);///建立T-R-T
	if(ID==2) glColor3f(1,0,0);
	else glColor3f(1,1,1);
	if(show[2]) glmDraw(uparmR,GLM_MATERIAL);
	glPushMatrix();
	glTranslatef(-1.999999,+0.073333,0);
	glRotatef(angle[3],0,0,1);
	glTranslatef(1.999999,-0.073333,0);
	if(ID==3) glColor3f(1,0,0);
	else glColor3f(1,1,1);
	if(show[3]) glmDraw(lowarmR,GLM_MATERIAL);
	glPopMatrix();
	glPopMatrix();
	glPopMatrix();
	glColor3f(0,1,0);
	glutSolidTeapot(0.02);
	glutSwapBuffers();
	}
	int oldX=0,oldY=0;
	void motion(int x,int y)
	{
	teapotX += (x -oldX)/150.0;
	teapotY -= (y -oldY)/150.0;
	angle[ID] +=(x - oldX);
	oldX=x;
	oldY=y;
	///angle = x;
	printf("glTranslatef(%f,%f,0);\n",teapotX,teapotY);
	glutPostRedisplay();
	}
	void mouse(int button,int state,int x,int y)
	{
	if(state==GLUT_DOWN){
	oldX = x;///teapotX = (x-150)/150.0;
	oldY = y;///teapotY = (150-y)/150.0;
	///angle= x;
	///if(fout==NULL) fout = fopen("file4.txt","w");///沒開檔，就開
	///fprintf(fout,"%f %f\n",teapotX,teapotY);///要再存座標
	}
	display();
	}
	///void keyboard(unsigned char key,int x,int y)
	///{
	/// if(fin==NULL){///如果檔案還沒fopen()，就開它
	/// fclose(fout);///前面mouse會開fout指標，所以要關掉
	/// fin = fopen("file4.txt","r");///沒開檔就開
	/// }
	/// fscanf(fin,"%f %f",&teapotX,&teapotY);///真的讀檔
	/// display();///重畫畫面
	///}
	int main(int argc,char** argv)
	{
	glutInit(&argc,argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);
	glutCreateWindow("week15");
	glutDisplayFunc(display);
	glutMouseFunc(mouse);
	glutMotionFunc(motion);
	glutKeyboardFunc(keyboard);///keyboard要做事了(開檔、讀檔)
	glutMainLoop();
	}