OpenGL Programming Guide- Red Book 例子程序库 -系列- 3-Chapter 2Drawing Geometric Objects-Part1

Example 2-1 : Using Line Stipple Patterns: lines.c

原始程序

#include 
#include 
#include "aux.h"

#define   drawOneLine(x1,y1,x2,y2) glBegin(GL_LINES); \
   glVertex2f ((x1),(y1)); glVertex2f ((x2),(y2)); glEnd();

void myinit (void) {
    /*  background to be cleared to black   */
    glClearColor (0.0, 0.0, 0.0, 0.0);
    glShadeModel (GL_FLAT);
}

void display(void)
{
    int i;

    glClear (GL_COLOR_BUFFER_BIT);
/*  draw all lines in white   */
    glColor3f (1.0, 1.0, 1.0);


/*  in 1st row, 3 lines, each with a different stipple   */
    glEnable (GL_LINE_STIPPLE);
    glLineStipple (1, 0x0101);   /*  dotted   */
    drawOneLine (50.0, 125.0, 150.0, 125.0);
    glLineStipple (1, 0x00FF);   /*  dashed   */
    drawOneLine (150.0, 125.0, 250.0, 125.0);
    glLineStipple (1, 0x1C47);   /*  dash/dot/dash   */
    drawOneLine (250.0, 125.0, 350.0, 125.0);

/*  in 2nd row, 3 wide lines, each with different stipple */
    glLineWidth (5.0);
    glLineStipple (1, 0x0101);
    drawOneLine (50.0, 100.0, 150.0, 100.0);
    glLineStipple (1, 0x00FF);
    drawOneLine (150.0, 100.0, 250.0, 100.0);
    glLineStipple (1, 0x1C47);
    drawOneLine (250.0, 100.0, 350.0, 100.0);
    glLineWidth (1.0);

/*  in 3rd row, 6 lines, with dash/dot/dash stipple,   */
/*  as part of a single connected line strip         */
    glLineStipple (1, 0x1C47);
    glBegin (GL_LINE_STRIP);
    for (i = 0; i < 7; i++)
   glVertex2f (50.0 + ((GLfloat) i * 50.0), 75.0);
    glEnd ();

/*  in 4th row, 6 independent lines,   */
/*  with dash/dot/dash stipple         */
    for (i = 0; i < 6; i++) {
   drawOneLine (50.0 + ((GLfloat) i * 50.0), 
       50.0, 50.0 + ((GLfloat)(i+1) * 50.0), 50.0);
    }

/*  in 5th row, 1 line, with dash/dot/dash stipple   */
/*  and repeat factor of 5         */
    glLineStipple (5, 0x1C47);
    drawOneLine (50.0, 25.0, 350.0, 25.0);
    glFlush ();
}

int main(int argc, char** argv)
{
    auxInitDisplayMode (AUX_SINGLE | AUX_RGBA);
    auxInitPosition (0, 0, 400, 150);
    auxInitWindow (argv[0]);
    myinit ();
    auxMainLoop(display);
}

调整后程序

// Example_2_1.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "windows.h"
#include 
#include 
#include 

#pragma comment(lib,"opengl32.lib")
#pragma comment(lib,"glu32.lib")
#pragma comment(lib,"glaux.lib")

#define   drawOneLine(x1,y1,x2,y2) glBegin(GL_LINES); \
glVertex2f ((x1),(y1)); glVertex2f ((x2),(y2)); glEnd();

void __stdcall myinit (void) {
    /*  background to be cleared to black   */
    glClearColor (0.0, 0.0, 0.0, 0.0);
    glShadeModel (GL_FLAT);
}

void __stdcall display(void)
{
    int i;
	
    glClear (GL_COLOR_BUFFER_BIT);
	/*  draw all lines in white   */
    glColor3f (1.0, 1.0, 1.0);
	
	
	/*  in 1st row, 3 lines, each with a different stipple   */
    glEnable (GL_LINE_STIPPLE);
    glLineStipple (1, 0x0101);   /*  dotted   */
    drawOneLine (50.0, 125.0, 150.0, 125.0);
    glLineStipple (1, 0x00FF);   /*  dashed   */
    drawOneLine (150.0, 125.0, 250.0, 125.0);
    glLineStipple (1, 0x1C47);   /*  dash/dot/dash   */
    drawOneLine (250.0, 125.0, 350.0, 125.0);
	
	/*  in 2nd row, 3 wide lines, each with different stipple */
    glLineWidth (5.0);
    glLineStipple (1, 0x0101);
    drawOneLine (50.0, 100.0, 150.0, 100.0);
    glLineStipple (1, 0x00FF);
    drawOneLine (150.0, 100.0, 250.0, 100.0);
    glLineStipple (1, 0x1C47);
    drawOneLine (250.0, 100.0, 350.0, 100.0);
    glLineWidth (1.0);
	
	/*  in 3rd row, 6 lines, with dash/dot/dash stipple,   */
	/*  as part of a single connected line strip         */
    glLineStipple (1, 0x1C47);
    glBegin (GL_LINE_STRIP);
    for (i = 0; i < 7; i++)
		glVertex2f (50.0 + ((GLfloat) i * 50.0), 75.0);
    glEnd ();
	
	/*  in 4th row, 6 independent lines,   */
	/*  with dash/dot/dash stipple         */
    for (i = 0; i < 6; i++) {
		drawOneLine (50.0 + ((GLfloat) i * 50.0), 
			50.0, 50.0 + ((GLfloat)(i+1) * 50.0), 50.0);
    }
	
	/*  in 5th row, 1 line, with dash/dot/dash stipple   */
	/*  and repeat factor of 5         */
    glLineStipple (5, 0x1C47);
    drawOneLine (50.0, 25.0, 350.0, 25.0);
    glFlush ();
}


int main(int argc, char** argv)
{
    auxInitDisplayMode (AUX_SINGLE | AUX_RGBA);
    auxInitPosition (0, 0, 400, 150);
    auxInitWindow (argv[0]);
    myinit ();
    auxMainLoop(display);
	return 0;
}

运行结果

Example 2-2 : Using Polygon Stipple Patterns: polys.c

原始程序

#include 
#include 
#include "aux.h"

void display(void)
{
    GLubyte fly[] = {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x03, 0x80, 0x01, 0xC0, 0x06, 0xC0, 0x03, 0x60, 
        0x04, 0x60, 0x06, 0x20, 0x04, 0x30, 0x0C, 0x20, 
        0x04, 0x18, 0x18, 0x20, 0x04, 0x0C, 0x30, 0x20,
        0x04, 0x06, 0x60, 0x20, 0x44, 0x03, 0xC0, 0x22, 
        0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 
        0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22,
        0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 
        0x66, 0x01, 0x80, 0x66, 0x33, 0x01, 0x80, 0xCC, 
        0x19, 0x81, 0x81, 0x98, 0x0C, 0xC1, 0x83, 0x30,
        0x07, 0xe1, 0x87, 0xe0, 0x03, 0x3f, 0xfc, 0xc0, 
        0x03, 0x31, 0x8c, 0xc0, 0x03, 0x33, 0xcc, 0xc0, 
        0x06, 0x64, 0x26, 0x60, 0x0c, 0xcc, 0x33, 0x30,
        0x18, 0xcc, 0x33, 0x18, 0x10, 0xc4, 0x23, 0x08, 
        0x10, 0x63, 0xC6, 0x08, 0x10, 0x30, 0x0c, 0x08, 
        0x10, 0x18, 0x18, 0x08, 0x10, 0x00, 0x00, 0x08};

    GLubyte halftone[] = {
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
        0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55};

    glClear (GL_COLOR_BUFFER_BIT);

   glColor3f (1.0, 1.0, 1.0);

    glRectf (25.0, 25.0, 125.0, 125.0);
    glEnable (GL_POLYGON_STIPPLE);
    glPolygonStipple (fly);
    glRectf (125.0, 25.0, 225.0, 125.0);
    glPolygonStipple (halftone);
    glRectf (225.0, 25.0, 325.0, 125.0);
    glDisable (GL_POLYGON_STIPPLE);

    glFlush ();
}

void myinit (void) 
{
    glClearColor (0.0, 0.0, 0.0, 0.0);
    glShadeModel (GL_FLAT);    
}


int main(int argc, char** argv)
{
    auxInitDisplayMode (AUX_SINGLE | AUX_RGBA);
    auxInitPosition (0, 0, 350, 150);
    auxInitWindow (argv[0]);
    myinit ();
    auxMainLoop(display);
}

调整后程序

// Example_2_2.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

#include "windows.h"
#include 
#include 
#include 

#pragma comment(lib,"opengl32.lib")
#pragma comment(lib,"glu32.lib")
#pragma comment(lib,"glaux.lib")

void __stdcall display(void)
{
    GLubyte fly[] = {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
			0x03, 0x80, 0x01, 0xC0, 0x06, 0xC0, 0x03, 0x60, 
			0x04, 0x60, 0x06, 0x20, 0x04, 0x30, 0x0C, 0x20, 
			0x04, 0x18, 0x18, 0x20, 0x04, 0x0C, 0x30, 0x20,
			0x04, 0x06, 0x60, 0x20, 0x44, 0x03, 0xC0, 0x22, 
			0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 
			0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22,
			0x44, 0x01, 0x80, 0x22, 0x44, 0x01, 0x80, 0x22, 
			0x66, 0x01, 0x80, 0x66, 0x33, 0x01, 0x80, 0xCC, 
			0x19, 0x81, 0x81, 0x98, 0x0C, 0xC1, 0x83, 0x30,
			0x07, 0xe1, 0x87, 0xe0, 0x03, 0x3f, 0xfc, 0xc0, 
			0x03, 0x31, 0x8c, 0xc0, 0x03, 0x33, 0xcc, 0xc0, 
			0x06, 0x64, 0x26, 0x60, 0x0c, 0xcc, 0x33, 0x30,
			0x18, 0xcc, 0x33, 0x18, 0x10, 0xc4, 0x23, 0x08, 
			0x10, 0x63, 0xC6, 0x08, 0x10, 0x30, 0x0c, 0x08, 
			0x10, 0x18, 0x18, 0x08, 0x10, 0x00, 0x00, 0x08};
		
		GLubyte halftone[] = {
			0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55, 
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
				0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55};
			
			glClear (GL_COLOR_BUFFER_BIT);
			
			glColor3f (1.0, 1.0, 1.0);
			
			glRectf (25.0, 25.0, 125.0, 125.0);
			glEnable (GL_POLYGON_STIPPLE);
			glPolygonStipple (fly);
			glRectf (125.0, 25.0, 225.0, 125.0);
			glPolygonStipple (halftone);
			glRectf (225.0, 25.0, 325.0, 125.0);
			glDisable (GL_POLYGON_STIPPLE);
			
			glFlush ();
}

void __stdcall myinit (void) 
{
    glClearColor (0.0, 0.0, 0.0, 0.0);
    glShadeModel (GL_FLAT);    
}


int main(int argc, char** argv)
{
    auxInitDisplayMode (AUX_SINGLE | AUX_RGBA);
    auxInitPosition (0, 0, 350, 150);
    auxInitWindow (argv[0]);
    myinit ();
    auxMainLoop(display);

	return 0;
}

运行结果