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OS/2 Shareware BBS: 10 Tools
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SAMPLES
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TK
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ACCUM.C
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C/C++ Source or Header
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1997-09-30
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3KB
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139 lines
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "tk.h"
GLenum doubleBuffer, directRender;
GLint thing1, thing2;
static void Init(void)
{
glClearColor(0.0, 0.0, 0.0, 0.0);
glClearAccum(0.0, 0.0, 0.0, 0.0);
thing1 = glGenLists(1);
glNewList(thing1, GL_COMPILE);
glColor3f(1.0, 0.0, 0.0);
glRectf(-1.0, -1.0, 1.0, 0.0);
glEndList();
thing2 = glGenLists(1);
glNewList(thing2, GL_COMPILE);
glColor3f(0.0, 1.0, 0.0);
glRectf(0.0, -1.0, 1.0, 1.0);
glEndList();
}
static void Reshape(int width, int height)
{
glViewport(0, 0, (GLint)width, (GLint)height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
static GLenum Key(int key, GLenum mask)
{
switch (key) {
case TK_B:
tkClipBoard();
break;
case TK_ESCAPE:
tkQuit();
case TK_1:
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
break;
case TK_2:
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
break;
default:
return GL_FALSE;
}
return GL_TRUE;
}
static void Draw(void)
{
glPushMatrix();
glScalef(0.8, 0.8, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glCallList(thing1);
glAccum(GL_LOAD, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
glCallList(thing2);
glAccum(GL_ACCUM, 0.5);
glAccum(GL_RETURN, 1.0);
glPopMatrix();
glFlush();
if (doubleBuffer) {
tkSwapBuffers();
}
}
static GLenum Args(int argc, char **argv)
{
GLint i;
doubleBuffer = GL_FALSE;
directRender = GL_TRUE;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-sb") == 0) {
doubleBuffer = GL_FALSE;
} else if (strcmp(argv[i], "-db") == 0) {
doubleBuffer = GL_TRUE;
} else if (strcmp(argv[i], "-dr") == 0) {
directRender = GL_TRUE;
} else if (strcmp(argv[i], "-ir") == 0) {
directRender = GL_FALSE;
} else {
printf("%s (Bad option).\n", argv[i]);
return GL_FALSE;
}
}
return GL_TRUE;
}
void main(int argc, char **argv)
{
GLenum type;
if (Args(argc, argv) == GL_FALSE) {
tkQuit();
}
tkInitPosition(0, 0, 300, 300);
type = TK_RGB | TK_ACCUM;
type |= (doubleBuffer) ? TK_DOUBLE : TK_SINGLE;
type |= (directRender) ? TK_DIRECT : TK_INDIRECT;
tkInitDisplayMode(type);
if (tkInitWindow("Accum Test") == GL_FALSE) {
tkQuit();
}
Init();
tkExposeFunc(Reshape);
tkReshapeFunc(Reshape);
tkKeyDownFunc(Key);
tkDisplayFunc(Draw);
tkExec();
}