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Файл:Тихомиров Ю. Программирование трёхмерной графики / Files / Samples / Lines
.c#include "basis.h"
static void Init(void );
static void CALLBACK Reshape(int width,int height);
static void CALLBACK Draw(void );
GLint windW, windH;
static void Init(void)
{
glClearColor(0.75f, 0.75f, 0.75f, 1.0f);
}
static void CALLBACK Reshape(int width, int height)
{
windW = (GLint)width;
windH = (GLint)height;
}
static void CALLBACK DrawAxies(int left)
{
GLint x;
GLushort pattern;
GLfloat width;
glColor3f(0.0f, 0.0f, 0.0f);
if(!left){
pattern = 0x1C47;
x = windW/4;
}
else{
pattern = 0x471C;
x = -windW/4;
}
glPushMatrix();
glGetFloatv(GL_LINE_WIDTH, &width);
glLineWidth(2.0f);
glLineStipple(2, pattern);
glEnable(GL_LINE_STIPPLE);
glBegin(GL_LINES);
glVertex2i(x, -windH/2);
glVertex2i(x, windH/2);
glEnd();
glDisable(GL_LINE_STIPPLE);
glLineWidth(width);
glBegin(GL_LINES);
glVertex2i(-windW/4 + 10, 0);
glVertex2i( windW/4 - 10, 0);
glVertex2i(0, -windH/2 + 10);
glVertex2i(0, windH/2 - 10);
glEnd();
glPopMatrix();
}
static void CALLBACK InitViewport(int x, int y, int width, int height)
{
glViewport(x, y, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(-windW/4, windW/4, -windH/2, windH/2);
glMatrixMode(GL_MODELVIEW);
}
static void CALLBACK DrawScene(GLenum mode)
{
// Здесь вызываются команды рисования
// ...
glBegin(mode);
glVertex2f(-windW/4 + windW/20, -windH/2 + windH/10);
glVertex2f( windW/4 - windW/20, -windH/2 + windH/10);
glVertex2f( windW/4 - windW/20, windH/2 - windH/10);
glEnd();
}
static void CALLBACK DrawLine(void)
{
glLineWidth(20.0f);
glBegin(GL_LINES);
glVertex2f(-windW/4 + windW/20, -windH/2 + windH/5);
glVertex2f( 0, windH/2 - windH/10);
glVertex2f(-windW/4 + windW/20 + 30, -windH/2 + windH/5);
glVertex2f( 30, windH/2 - windH/10);
glEnd();
glLineWidth(1.0f);
}
static void CALLBACK Draw(void)
{
glClear(GL_COLOR_BUFFER_BIT);
InitViewport(0,0, windW/2, windH);
DrawAxies(0);
glColor3f(0.0, 0.0, 1.0);
DrawScene(GL_LINE_STRIP);
glColor3f(1.0, 0.0, 1.0);
DrawLine();
InitViewport(windW/2, 0, windW/2, windH);
DrawAxies(1);
glColor3f(1.0, 0.0, 0.0);
DrawScene(GL_LINE_LOOP);
glEnable(GL_LINE_SMOOTH);
glColor3f(1.0, 0.0, 1.0);
DrawLine();
glDisable(GL_LINE_SMOOTH);
glFinish();
auxSwapBuffers();
}
void main(int argc, char **argv)
{
windW = 400;
windH = 300;
auxInitPosition(200, 100, windW, windH);
auxInitDisplayMode(AUX_RGB | AUX_DOUBLE);
if (auxInitWindow("Линии, линии, линии ...") == GL_FALSE) {
auxQuit();
}
Init();
auxExposeFunc((AUXEXPOSEPROC)Reshape);
auxReshapeFunc((AUXRESHAPEPROC)Reshape);
auxMainLoop(Draw);
}
Соседние файлы в папке Samples