hawk

#include <math.h>		// For math routines (such as sqrt & trig).
#include <stdio.h>
#include <GL/glut.h>	// OpenGL Graphics Utility Library
#include "GluCylinders.h"
void ani(float , float , float );
void renderCylinder(float x1, float y1, float z1, float x2,float y2, float z2, float radius,int subdivisions,GLUquadricObj *quadric);
void renderCylinder_convenient(float x1, float y1, float z1, float x2,float y2, float z2, float radius,int subdivisions);
// The next global variable controls the animation's state and speed.
float RotateAngle = 0.0f;		// Angle in degrees of rotation around y-axis
float Azimuth = 0.0;			// Rotated up or down by this amount

float AngleStepSize = 3.0f;		// Step three degrees at a time
const float AngleStepMax = 10.0f;
const float AngleStepMin = 0.1f;

int WireFrameOn = 1;			// == 1 for wire frame mode

//points

float Geometry[9][3] = {
	{ 4,2.0,0},
	{ 4,2.0,0},	//	Point1
	{-1.5,0.2,0},

	{-2,0.3,0},
	{-2.5,0.6,0},

	{-3,0.8,0},

	{-3.5,1.0,0},
	{ -5.5,1.8,0},//point 2
	{ -5.5,1.8,0}

};
int x2[5],y2[5],z2[5];
unsigned int LOD=20;

// glutKeyboardFunc is called below to set this function to handle
//		all "normal" key presses.
void myKeyboardFunc( unsigned char key, int x, int y )
{
	switch ( key ) {
	case 'w':
		WireFrameOn = 1-WireFrameOn;
		if ( WireFrameOn ) {
			glPolygonMode ( GL_FRONT_AND_BACK, GL_LINE );		// Just show wireframes
		}
		else {
			glPolygonMode ( GL_FRONT_AND_BACK, GL_FILL );		// Show solid polygons
		}
		glutPostRedisplay();
		break;
	case 'R':
		AngleStepSize *= 1.5;
		if (AngleStepSize>AngleStepMax ) {
			AngleStepSize = AngleStepMax;
		}
		break;
	case 'r':
		AngleStepSize /= 1.5;
		if (AngleStepSize<AngleStepMin ) {
			AngleStepSize = AngleStepMin;
		}
		break;
	case 27:	// Escape key
		exit(1);
	}
}

// glutSpecialFunc is called below to set this function to handle
//		all "special" key presses.  See glut.h for the names of
//		special keys.
void mySpecialKeyFunc( int key, int x, int y )
{
	switch ( key ) {
	case GLUT_KEY_UP:
		Azimuth += AngleStepSize;
		if ( Azimuth>80.0f ) {
			Azimuth = 80.0f;
		}
		break;
	case GLUT_KEY_DOWN:
		Azimuth -= AngleStepSize;
		if ( Azimuth < -80.0f ) {
			Azimuth = -80.0f;
		}
		break;
	case GLUT_KEY_LEFT:
		RotateAngle += AngleStepSize;
		if ( RotateAngle > 180.0f ) {
			RotateAngle -= 360.0f;
		}
		break;
	case GLUT_KEY_RIGHT:

		RotateAngle -= AngleStepSize;
		if ( RotateAngle < -180.0f ) {
			RotateAngle += 360.0f;

		}
		break;
	}
	glutPostRedisplay();

}
/*
 * drawScene() handles the animation and the redrawing of the
 *		graphics window contents.
 */
void drawScene(void)
{int i,j,k=0,m=0;
float b0,b1,b2,b3,t,x3,y3,z3,n1,n2,n3;
	//Clear the rendering window

//for( i=0;i<5;i++)
//{
//x2[i]=0.5*(G[i+1][0]-G[i-1][0]);
//y2[i]=0.5*(G[i+1][1]-G[i-1][1]);
//z2[i]=0.5*(G[i+1][2]-G[i-1][2]);
//}

// Clear the rendering window
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);


	// Rotate the image
	glMatrixMode( GL_MODELVIEW );				// Current matrix affects objects positions
	glLoadIdentity();							// Initialize to the identity

	glTranslatef( -0.5, 0.0, -35.0 );				// Translate  from origin (in front of viewer)
	glRotatef( RotateAngle, 0.0, 1.0, 0.0 );		// Rotate around y-axis
	glRotatef( Azimuth, 1.0, 0.0, 0.0 );			// Set Azimuth angle
//------------------------------------------------------------
	glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( -4.5, 0.5, 0.0 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color x<=4.5 0.5=<y<=2.5
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(1.5, 0.2, 8, 8 );
	glPopMatrix();

	glEnable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( -4.5, 0.0, 0.0 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 0.2, 1.0, 0.2 );					// Greenish color
	// Parameters: height, base radius, top radius, slices, stacks
	drawGluSlantCylinderWithCaps( 0.5, 0.01, 0.2, 28, 28 );
	glPopMatrix();

//------------------------------------------------------------------1st wicket
		glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( -4.5, 0.5, 0.6 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(1.5, 0.2, 8, 8 );
	glPopMatrix();

	glEnable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( -4.5, 0.0, 0.6 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 0.2, 1.0, 0.2 );					// Greenish color
	// Parameters: height, base radius, top radius, slices, stacks
	drawGluSlantCylinderWithCaps( 0.5, 0.01, 0.2, 28, 28 );
	glPopMatrix();


//wills
		glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( -4.5, 2.05, 0.6 );
	glRotatef( -180.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(0.6, 0.05, 18, 18 );
	glPopMatrix();

//---------------------------------------------------------------------------2nd
		glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( -4.5, 0.5, 1.2 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(1.5, 0.2, 8, 8 );
	glPopMatrix();

	glEnable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( -4.5, 0.0, 1.2 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 0.2, 1.0, 0.2 );					// Greenish color
	// Parameters: height, base radius, top radius, slices, stacks
	drawGluSlantCylinderWithCaps( 0.5, 0.01, 0.2, 28, 28 );
	glPopMatrix();
	//wills
	glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( -4.5, 2.05, 1.3 );
	glRotatef( -180.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(0.6, 0.05, 18, 18 );
	glPopMatrix();


	//--------------------------------------------------3rd wicket
 //   glDisable( GL_CULL_FACE );
	//glPushMatrix();
	//glTranslatef( -4.5, 0.5, 0.0 );
	//glRotatef( -90.0, 1.0, 0.0, 0.0 );
	//glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	//// Parameters: height, radius, slices, stacks
	//drawGluCylinder(1.5, 0.2, 8, 8 );
	//glPopMatrix();
 //   glEnable( GL_CULL_FACE );
	//glPushMatrix();
	//glTranslatef( -4.5, 0.0, 0.0 );
	//glRotatef( -90.0, 1.0, 0.0, 0.0 );
	//glColor3f( 0.2, 1.0, 0.2 );					// Greenish color
	//// Parameters: height, base radius, top radius, slices, stacks
	//drawGluSlantCylinderWithCaps( 0.5, 0.05, 0.2, 28, 28 );
	//glPopMatrix();
 //   glDisable( GL_CULL_FACE );
	//glPushMatrix();
	//glTranslatef( -4.5, 0.5, 1.0 );
	//glRotatef( -90.0, 1.0, 0.0, 0.0 );
	//glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	//// Parameters: height, radius, slices, stacks
	//drawGluCylinder(1.5, 0.2, 8, 8 );
	//glPopMatrix();








	//-------------------------------
	glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( 4.5, 0.5, 0.0 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(1.5, 0.2, 8, 8 );
	glPopMatrix();

	glEnable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( 4.5, 0.0, 0.0 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 0.2, 1.0, 0.2 );					// Greenish color
	// Parameters: height, base radius, top radius, slices, stacks
	drawGluSlantCylinderWithCaps( 0.5, 0.01, 0.2, 28, 28 );
	glPopMatrix();


		glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( 4.5, 0.5, 0.6 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(1.5, 0.2, 8, 8 );
	glPopMatrix();

	glEnable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( 4.5, 0.0, 0.6 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 0.2, 1.0, 0.2 );					// Greenish color
	// Parameters: height, base radius, top radius, slices, stacks
	drawGluSlantCylinderWithCaps( 0.5, 0.01, 0.2, 28, 28 );
	glPopMatrix();

	//wills
	glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( 4.5, 2.05, 0.6 );
	glRotatef( -180.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(0.6, 0.05, 18, 18 );
	glPopMatrix();


		glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( 4.5, 0.5, 1.2 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(1.5, 0.2, 8, 8 );
	glPopMatrix();

	glEnable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( 4.5, 0.0, 1.2 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 0.2, 1.0, 0.2 );					// Greenish color
	// Parameters: height, base radius, top radius, slices, stacks
	drawGluSlantCylinderWithCaps( 0.5, 0.01, 0.2, 28, 28 );
	glPopMatrix();
    glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( 4.5, 0.5, 0.0 );
	glRotatef( -90.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(1.5, 0.2, 8, 8 );
	glPopMatrix();

	//wills
	glDisable( GL_CULL_FACE );
	glPushMatrix();
	glTranslatef( 4.5, 2.05, 1.3 );
	glRotatef( -180.0, 1.0, 0.0, 0.0 );
	glColor3f( 1.0, 0.2, 0.2 );					// Reddish color
	// Parameters: height, radius, slices, stacks
	drawGluCylinder(0.6, 0.05, 18, 18 );
	glPopMatrix();




	glBegin(GL_LINE_STRIP);
	// use the parametric time value 0 to 1
	for( j=1;j<=2;j++)
	{
	for(i=0;i!=LOD;++i) {
		//glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
		 t = (float)i/(LOD-1);

		  x3 = 0.5*((-Geometry[j-1][0] + 3*Geometry[j][0]  -3*Geometry[j+1][0] + Geometry[j+2][0])*t*t*t+
			(2*Geometry[j-1][0] -5*Geometry[j][0] +4*Geometry[j+1][0] -Geometry[j+2][0])*t*t +(-Geometry[j-1][0] + Geometry[j+1][0])*t + 2*Geometry[j][0]);

		y3 = 0.5*((-Geometry[j-1][1] + 3*Geometry[j][1]  -3*Geometry[j+1][1] + Geometry[j+2][1])*t*t*t+
			(2*Geometry[j-1][1] -5*Geometry[j][1] +4*Geometry[j+1][1] -Geometry[j+2][1])*t*t +(-Geometry[j-1][1] + Geometry[j+1][1])*t + 2*Geometry[j][1]);



		z3 = 0.5*((-Geometry[j-1][2] + 3*Geometry[j][2]  -3*Geometry[j+1][2] + Geometry[j+2][2])*t*t*t+
			(2*Geometry[j-1][2] -5*Geometry[j][2] +4*Geometry[j+1][2] -Geometry[j+2][2])*t*t +(-Geometry[j-1][2] + Geometry[j+1][2])*t + 2*Geometry[j][2]);

		// specify the point

		glVertex3f( x3,y3,z3);

glColor3f(1,0,0);

		// specify the point
		glVertex3f( x3,y3,z3 );
		ani(x3,y3,z3);
		//for(i=0;i<=2;i++);3
		 glColor3f(1,1,0);
		  if(i==0)
			renderCylinder_convenient(Geometry[j][0],Geometry[j][1],Geometry[j][2],x3,y3,z3,0.3,32);
		  else
			  renderCylinder_convenient(n1,n2,n3,x3,y3,z3,0.3,32);
		  n1=x3; n2=y3; n3=z3;

		glutSwapBuffers();
		}

		}


	glEnd();



  //  glFlush();
    //glutSwapBuffers();
}



// Initialize OpenGL's rendering modes
void initRendering()
{
    glEnable( GL_DEPTH_TEST );	// Depth testing must be turned on

	glCullFace( GL_BACK );

	glPolygonMode ( GL_FRONT_AND_BACK, GL_LINE );		// Just show wireframes at first
}

// Called when the window is resized
//		w, h - width and height of the window in pixels.
void resizeWindow(int w, int h)
{
	double aspectRatio;

	// Define the portion of the window used for OpenGL rendering.
	glViewport( 0, 0, w, h );	// View port uses whole window

	// Set up the projection view matrix: perspective projection
	// Determine the min and max values for x and y that should appear in the window.
	// The complication is that the aspect ratio of the window may not match the
	//		aspect ratio of the scene we want to view.
	w = (w==0) ? 1 : w;
	h = (h==0) ? 1 : h;
	aspectRatio = (double)w / (double)h;
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    gluPerspective( 15.0, aspectRatio, 25.0, 45.0 );

}


// Main routine
// Set up OpenGL, define the callbacks and start the main loop
int main( int argc, char** argv )
{
	glutInit(&argc, argv);

	// We're going to animate it, so double buffer
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );

	// Window position (from top corner), and size (width% and hieght)
    glutInitWindowPosition( 10, 60 );
    glutInitWindowSize( 360, 360 );
    glutCreateWindow( "GluCylinders" );

	// Initialize OpenGL as we like it..
    initRendering();

	// Set up callback functions for key presses
	glutKeyboardFunc( myKeyboardFunc );			// Handles "normal" ascii symbols
	glutSpecialFunc( mySpecialKeyFunc );		// Handles "special" keyboard keys

	// Set up the callback function for resizing windows
    glutReshapeFunc( resizeWindow );

	// Call this for background processing
	// glutIdleFunc( myIdleFunction );

	// call this whenever window needs redrawing
    glutDisplayFunc( drawScene );

	fprintf(stdout, "Arrow keys control viewpoint.\n");
	fprintf(stdout, "Press \"w\" to toggle wireframe mode.\n");
	fprintf(stdout, "Press \"R\" or \"r\" to increase or decrease rate of movement (respectively).\n");

	// Start the main loop.  glutMainLoop never returns.
	glutMainLoop(  );

    return(0);	// This line is never reached.
}

// ************************************************************************
// These are four general purpose routines for generating
//	cylinders, with or without caps.
// See the OpenGL redbook or other glu documentation for more information.
// These generate normals, but not texture coordinates.
// To generate texture coordinates, you need to modify the code to
//   call gluQuadricTexture();
// For higher performance, you should consider putting your cylinders into
//	 a display list.
// Please note these routines do not do all possible error checking, and
//	 thus should not be used in a production or other critical environment.
// ************************************************************************

//  A Reusable gluQuadric object:
GLUquadricObj* myReusableQuadric = 0;

void drawGluCylinder( double height, double radius, int slices, int stacks ) {
	drawGluSlantCylinder( height, radius, radius, slices, stacks );
}

void drawGluSlantCylinder( double height, double radiusBase, double radiusTop, int slices, int stacks )
{
	if ( ! myReusableQuadric ) {
		myReusableQuadric = gluNewQuadric();
		// Should (but don't) check if pointer is still null --- to catch memory allocation errors.
		gluQuadricNormals( myReusableQuadric, GL_TRUE );
	}
	// Draw the cylinder.
	gluCylinder( myReusableQuadric, radiusBase, radiusTop, height, slices, stacks );
}


void drawGluCylinderWithCaps( double height, double radius, int slices, int stacks ) {
	drawGluSlantCylinderWithCaps( height, radius, radius, slices, stacks );
}
void ani(float x, float y, float z)
{int i, j;

glLoadIdentity();

glTranslatef(-0.5, 0.0, -35.0);
glRotatef( RotateAngle, 0.0, 1.0, 0.0 );
glRotatef( Azimuth, 1.0, 0.0, 0.0 );

glPushMatrix();
glTranslatef (x, y, z);

glColor3f( 1, 0.0, 0.2 );
glutSolidSphere (0.1, 10, 10);



for(i = 0; i < 1000; i++)
for(j = 0; j < 5000; j++);



glPopMatrix();
//glPushMatrix();
glutSwapBuffers();
}
void renderCylinder(float x1, float y1, float z1, float x2,float y2, float z2, float radius,int subdivisions,GLUquadricObj *quadric)
{   float v,rx,ry,ax,vx = x2-x1;
float vy = y2-y1;
float vz = z2-z1;   //handle the degenerate case of z1 == z2 with an approximation
if(vz == 0)
vz =.00000001;
 v = sqrt( vx*vx + vy*vy + vz*vz );
 ax = 57.2957795*acos( vz/v );
if ( vz < 0.0 )
ax = -ax;
 rx = -vy*vz;
 ry = vx*vz;
glPushMatrix();   //draw the cylinder body
glTranslatef( x1,y1,z1 );
glRotatef(ax, rx, ry, 0.0);
gluQuadricOrientation(quadric,GLU_OUTSIDE);
gluCylinder(quadric, radius, radius, v, subdivisions, 1);   //draw the first cap
gluQuadricOrientation(quadric,GLU_INSIDE);
gluDisk( quadric, 0.0, radius, subdivisions, 1);
glTranslatef( 0,0,v );   //draw the second cap
gluQuadricOrientation(quadric,GLU_OUTSIDE);
gluDisk( quadric, 0.0, radius, subdivisions, 1);
glPopMatrix();
}

void renderCylinder_convenient(float x1, float y1, float z1, float x2,float y2, float z2, float radius,int subdivisions){
	//the same quadric can be re-used for drawing many cylinders
	GLUquadricObj *quadric=gluNewQuadric();
	gluQuadricNormals(quadric, GLU_SMOOTH);
	renderCylinder(x1,y1,z1,x2,y2,z2,radius,subdivisions,quadric);
	gluDeleteQuadric(quadric);}


void drawGluSlantCylinderWithCaps( double height, double radiusBase, double radiusTop, int slices, int stacks )
{
	// First draw the cylinder
	drawGluSlantCylinder( height, radiusBase, radiusTop, slices, stacks );

	// Draw the top disk cap
	glPushMatrix();
	glTranslated(0.0, 0.0, height);
	gluDisk( myReusableQuadric, 0.0, radiusTop, slices, stacks );
	glPopMatrix();

	// Draw the bottom disk cap
	glPushMatrix();
	glRotated(180.0, 1.0, 0.0, 0.0);
	gluDisk( myReusableQuadric, 0.0, radiusBase, slices, stacks );
	glPopMatrix();

}