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กระทู้ #3613 [C] (จาก IP: 110.168.60.79)
ทำรูปสี่เหลี่ยมวิ่งรอบจอด้วย CODE BLOCK
ทำรูปสี่เหลี่ยมวิ่งรอบจอด้วย CODE BLOCK ในหน้า render_scene
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| จากคุณ
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อั้ม / aum.kns@gmail.com [2017-08-26 14:06:17]
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ความคิดเห็น #29443 (จาก IP: 49.228.73.147)
ผมมีคลิปสอนให้แล้ว ดูให้เข้าใจหลักการ แล้วเอาไปเขียน
ฝึกทักษะ เอาเองครับ |
| จากคุณ
:
maddog [2017-08-27 10:50:02]
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ความคิดเห็น #29444 (จาก IP: 110.168.60.252)
#define GLUT_DISABLE_ATEXIT_HACK
#define GLEW_STATIC
#include <iostream>
#include <vector>
#include <string>
#include <math.h>
#include <time.h>
#include <stdlib.h>
#include <GL/glew.h>
#include <GL/freeglut.h>
#define CANVAS_WIDTH 1000
#define CANVAS_HEIGHT 1000
#define WINDOW_WIDTH 700
#define WINDOW_HEIGHT 700
#define CANVAS_LEFT -75
#define CANVAS_RIGHT 75
#define CANVAS_BOTTOM -75
#define CANVAS_TOP 75
#define MY_POINT_SIZE 1
using namespace std;
float aum = 0.0f;
// Function declarations.
void init_opengl();
void init_glew();
void update_scene();
void reshape_scene(GLint width, GLint height);
void draw_grid();
void render_scene();
void on_keydown(unsigned char key, int x, int y);
/**
*
*/
void init_opengl()
{
glClearColor(0.0, 0.0, 0.0,1.0);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glLineWidth(5.0f);
glPointSize(MY_POINT_SIZE);
}
/**
*
*/
void init_glew() {
// GLEW
GLenum err = glewInit();
cout << "GLEW initilization: " << err << endl;
// If there is no error, list the supported extensions.
if(!err) {
cout << "Supported extensions:" << endl;
if (GLEW_VERSION_1_3) {cout << " GLEW_VERSION_1_3" << endl;}
if (GL_VERSION_1_4) {cout << " GL_VERSION_1_4" << endl;}
if (GL_ARB_point_sprite) {cout << " GL_ARB_point_sprite" << endl;}
}
}
/**
* Update scene.
*/
void update_scene()
{
// Re-render the canvas.
aum += 0.05f;
glutPostRedisplay();
}
/**
*
*/
void reshape_scene(GLint width, GLint height)
{
float aspect_ratio = width/((float)height);
glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(CANVAS_LEFT,
CANVAS_RIGHT,
CANVAS_BOTTOM,
CANVAS_TOP);
}
/**
*
*/
void draw_box(float w, float h)
{
glBegin(GL_TRIANGLE_STRIP);
glVertex3f(-w/2.0, -h/2.0, 0.0);
glVertex3f(w/2.0, -h/2.0, 0.0);
glVertex3f(-w/2.0, h/2.0, 0.0);
glVertex3f(w/2.0, h/2.0, 0.0);
glEnd();
}
/**
* Render the canvas.
*/
void render_scene()
{
// Clear screen
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Reset projection matrix.
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(CANVAS_LEFT,
CANVAS_RIGHT,
CANVAS_BOTTOM,
CANVAS_TOP);
// Reset model-view matrix.
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// Render scene element(s).
// PUT YOUR CODE HERE!
glBegin(GL_LINE_LOOP);
glColor3f(1.0, 1., 1.0);
glVertex3f(-65.0, 65.0, 0.0);
glVertex3f(-65.0, -65.0, 0.0);
glVertex3f(65.0, -65.0, 0.0);
glVertex3f(65.0, 65.0, 0.0);
glEnd();
//A
glBegin(GL_LINE_LOOP);
glColor3f(1.0, 1., 1.0);
glVertex3f(-30.0, 50.0, 0.0);
glVertex3f(-50.0, 50.0, 0.0);
glVertex3f(-50.0, 30.0, 0.0);
glVertex3f(-45.0, 30.0, 0.0);
glVertex3f(-45.0, 35.0, 0.0);
glVertex3f(-35.0, 35.0, 0.0);
glVertex3f(-35.0, 30.0, 0.0);
glVertex3f(-30.0, 30.0, 0.0);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex3f(-45.0, 45.0, 0.0);
glVertex3f(-45.0, 40.0, 0.0);
glVertex3f(-35.0, 40.0, 0.0);
glVertex3f(-35.0, 45.0, 0.0);
glEnd();
glBegin(GL_TRIANGLES);
glColor3f(0.5, 0.5, 1.0);
glVertex3f(-45.0, 50.0, 0.0);
glVertex3f(-50.0, 30.0, 0.0);
glVertex3f(-45.0, 30.0, 0.0);
glEnd();
glBegin(GL_TRIANGLE_STRIP);
glVertex3f(-45.0, 50.0, 0.0);
glVertex3f(-45.0, 45.0, 0.0);
glVertex3f(-30.0, 50.0, 0.0);
glVertex3f(-30.0, 45.0, 0.0);
glVertex3f(-30.0, 30.0, 0.0);
glVertex3f(-35.0, 45.0, 0.0);
glVertex3f(-35.0, 30.0, 0.0);
glEnd();
glBegin(GL_TRIANGLE_FAN);
glVertex3f(-45.0, 40.0, 0.0);
glVertex3f(-45.0, 35.0, 0.0);
glVertex3f(-35.0, 35.0, 0.0);
glVertex3f(-35.0, 40.0, 0.0);
glEnd();
glPushMatrix();
glTranslatef(-40.0,40.0,0.0);
glRotatef (-aum*1 , 0.0, 0.0, 1.0);
glTranslatef(30.0,0.0,0.0);
glColor3f(0.5, 1., 0.5);
draw_box(5.0, 5.0);
glPopMatrix();
//A
//U
glBegin(GL_LINE_LOOP);
glColor3f(1.0, 1., 1.0);
glVertex3f(-5.0, 10.0, 0.0);
glVertex3f(-10.0, 10.0, 0.0);
glVertex3f(-10.0, -10.0, 0.0);
glVertex3f(10.0, -10.0, 0.0);
glVertex3f(10.0, 10.0, 0.0);
glVertex3f(5.0, 10.0, 0.0);
glVertex3f(5.0, -5.0, 0.0);
glVertex3f(-5.0, -5.0, 0.0);
glEnd();
glBegin(GL_TRIANGLE_STRIP);
glColor3f(0.5, 1., 0.5);
glVertex3f(-5.0, 10.0, 0.0);
glVertex3f(-10.0, -10.0, 0.0);
glVertex3f(-5.0, -10.0, 0.0);
glVertex3f(-5.0, -5.0, 0.0);
glVertex3f(5.0, -5.0, 0.0);
glVertex3f(-5.0, -10.0, 0.0);
glVertex3f(5.0, -10.0, 0.0);
glVertex3f(10.0, -10.0, 0.0);
glVertex3f(5.0, 10.0, 0.0);
glVertex3f(10.0, 10.0, 0.0);
glEnd();
glPushMatrix();
glRotatef (-aum*2 , 0.0, 0.0, 1.0);
glTranslatef(30.0,0.0,0.0);
glColor3f(1.0, 0.5, 0.5);
draw_box(5.0, 5.0);
glPopMatrix();
//U
//M
glBegin(GL_LINE_LOOP);
glColor3f(1.0, 1., 1.0);
glVertex3f(30.0, -30.0, 0.0);
glVertex3f(30.0, -50.0, 0.0);
glVertex3f(35.0, -50.0, 0.0);
glVertex3f(35.0, -35.0, 0.0);
glVertex3f(40.0, -45.0, 0.0);
glVertex3f(45.0, -35.0, 0.0);
glVertex3f(45.0, -50.0, 0.0);
glVertex3f(50.0, -50.0, 0.0);
glVertex3f(50.0, -30.0, 0.0);
glVertex3f(45.0, -30.0, 0.0);
glVertex3f(40.0, -40.0, 0.0);
glVertex3f(35.0, -30.0, 0.0);
glEnd();
glBegin(GL_TRIANGLE_STRIP);
glColor3f(1.0, 0.5, 0.5);
glVertex3f(30.0, -50.0, 0.0);
glVertex3f(35.0, -50.0, 0.0);
glVertex3f(35.0, -30.0, 0.0);
glVertex3f(35.0, -35.0, 0.0);
glVertex3f(40.0, -40.0, 0.0);
glVertex3f(35.0, -35.0, 0.0);
glVertex3f(40.0, -45.0, 0.0);
glVertex3f(45.0, -35.0, 0.0);
glVertex3f(40.0, -40.0, 0.0);
glVertex3f(45.0, -30.0, 0.0);
glVertex3f(50.0, -30.0, 0.0);
glVertex3f(45.0, -50.0, 0.0);
glVertex3f(50.0, -50.0, 0.0);
glEnd();
glPushMatrix();
glTranslatef(40.0,-40.0,0.0);
glRotatef (-aum*4 , 0.0, 0.0, 1.0);
glTranslatef(30.0,0.0,0.0);
glColor3f(0.5, 0.5, 1.0);
draw_box(5.0, 5.0);
glPopMatrix();
//M
glPushMatrix();
gl
glTranslatef(-70.0,70.0,0.0);
glColor3f(0.5, 0.5, 0.5);
draw_box(10.0, 10.0);
glPopMatrix();
// Done.
glutSwapBuffers();
}
/**
*
*/
void on_keydown(unsigned char key, int x, int y)
{
}
/**
* Main entry.
*
*/
int main(int argc, char **argv)
{
srand(time(NULL));
glutInitWindowSize(WINDOW_WIDTH, WINDOW_HEIGHT);
glutInitWindowPosition(40, 40);
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
glutCreateWindow("CHONNIKAN KUNCHON");
// Setup callback functions.
glutDisplayFunc(render_scene);
glutIdleFunc(update_scene);
glutReshapeFunc(reshape_scene);
glutKeyboardFunc(on_keydown);
// Initializations.
init_opengl(); // OpenGL
init_glew(); // GLEW
// Start the main loop.
glutMainLoop();
return 0;
}
ผมลอง gotoxy แล้วแต่ก็ยังเออเร่อครับ |
| จากคุณ
:
อั้ม / aum.kns@gmail.com [2017-08-27 12:53:17]
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ความคิดเห็น #29445 (จาก IP: 202.44.225.15)
ลองสร้างตัวแปลอีกตัวไว้ใน update_scene
แล้วเรียกตรง gltranslate(ตัวแปล,0.0,0.0);
นะครับ |
| จากคุณ
:
zaqbiwty / zaqsuvicha@gmail.com [2017-08-27 20:09:01]
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ความคิดเห็น #29446 (จาก IP: 61.91.35.66)
| ผมลอง gotoxy แล้วแต่ก็ยังเออเร่อครับ >> error ว่า ? |
| จากคุณ
:
maddog [2017-08-28 11:45:52]
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