Hi i need some help i need to rotate my airplane left and right with GLUT_KEY_LEFT & GLUT_KEY_RIGHT keys can anyone help
as i am new to open gl i am pulling my hair out the code below is what i have so far it moves how i want it i just need to get the rotation sorted…
Any help will be great…
jakes
///////////////////////////////////////
#include <math.h>
#include <GL/glut.h>
#include <stdlib.h>
static float angle = 0.0, rotateAngle = 0.0, ratio;
static float x = 0.0f, y = 3.0f, z = 2.0f;
static float lx = 0.0f, ly = 0.0f, lz = -1.0f;
int deltaMove = 0;
static GLfloat xRot = 0.0f;
static GLfloat yRot = 0.0f;
static GLfloat yPos = 0.0f;
static GLfloat zRot = 0.0f;
static GLfloat zPos = 0.0f;
static GLfloat xPos = 0.0f;
void changeSize(int w, int h)
{
// Prevent a divide by zero, when window is too short
// (you cant make a window of zero width).
if(h == 0)
h = 1;
ratio = 1.0f * w / h;
// Reset the coordinate system before modifying
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// Set the viewport to be the entire window
glViewport(0, 0, w, h);
// Set the clipping volume
gluPerspective(45,ratio,1,1000);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(x, y, z,
x + lx,y + ly,z + lz,
0.0f,1.0f,0.0f);
}
void drawPlane()
{
glPushMatrix();
//moves in Z direction
//glTranslatef(0.0f, 0.0f, zPos);
glLoadIdentity();
//Banks left & right
glRotatef(xRot,0.0f,0.0f,1.0f);
//Translate to centre of camera
glTranslatef(0.0f, 0.0f, -13.0f);
//Rotate to move with camera
glRotatef(180.0, 0.0,250.0, 0.0);
//Scale to size
glScalef(0.0800f, 0.1f, 0.1f);
glBegin(GL_TRIANGLES);
//white
glColor3ub(255, 255, 255);
glVertex3f(0.0f, 0.0f, 60.0f);
glVertex3f(-15.0f, 0.0f, 30.0f);
glVertex3f(15.0f,0.0f,30.0f);
// Black
glColor3ub(255, 255, 255);
// glColor3ub(0,0,0);
glVertex3f(15.0f,0.0f,30.0f);
glVertex3f(0.0f, 15.0f, 30.0f);
glVertex3f(0.0f, 0.0f, 60.0f);
// some code taking out this would be the airplane
glEnd(); //
glPopMatrix();
}
void initScene() {
glEnable(GL_DEPTH_TEST);
}
void orientMe(float ang) {
lx = sin(ang);
lz = -cos(ang);
glLoadIdentity();
gluLookAt(x, y, z,
x + lx,y + ly,z + lz,
0.0f,1.0f,0.0f);
}
void moveMeFlat(int i) {
x = x + i*(lx)0.01;
z = z + i(lz)*0.01;
glLoadIdentity();
gluLookAt(x, y, z,
x + lx,y + ly,z + lz,
0.0f,1.0f,0.0f);
}
void renderScene(void) {
glClearColor(0.0f, 0.5f, 1.0f, 0.0f );
if (deltaMove)
moveMeFlat(deltaMove);
if (rotateAngle) {
angle += rotateAngle;
//xrot code below rotates the plane when i press the left key
//and when i press the right key does the same this is not what i want .
xRot += 0.01f;
orientMe(angle);
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
drawPlane();
// Draw ground
glColor3f(0.0f, 0.0f, 0.3f);
glBegin(GL_QUADS);
glVertex3f(-100.0f, 0.0f, -100.0f);
glVertex3f(-100.0f, 0.0f, 100.0f);
glVertex3f( 100.0f, 0.0f, 100.0f);
glVertex3f( 100.0f, 0.0f, -100.0f);
glEnd();
glutSwapBuffers();
}
void pressKey(int key, int x, int y) {
switch (key) {
case GLUT_KEY_LEFT : rotateAngle = -0.0003f; break;
case GLUT_KEY_RIGHT : rotateAngle =0.0003f;break;
case GLUT_KEY_UP : deltaMove = 1;break;
case GLUT_KEY_DOWN : deltaMove = -1;break;
}
}
void releaseKey(int key, int x, int y) {
switch (key) {
case GLUT_KEY_LEFT :
case GLUT_KEY_RIGHT : rotateAngle = 0.0f; break;
case GLUT_KEY_UP :
case GLUT_KEY_DOWN : deltaMove = 0;break;
}
}
void processNormalKeys(unsigned char key, int x, int y) {
if (key == 27)
exit(0);
}
int main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowPosition(100,100);
glutInitWindowSize(1000, 800);
glutCreateWindow(“plane”);
initScene();
//glutIgnoreKeyRepeat(1);
glutKeyboardFunc(processNormalKeys);
glutSpecialFunc(pressKey);
glutSpecialUpFunc(releaseKey);
glutDisplayFunc(renderScene);
glutIdleFunc(renderScene);
glutReshapeFunc(changeSize);
glutMainLoop();
return(0);
}