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Diffstat (limited to 'progs/samples/point.c')
| -rw-r--r-- | progs/samples/point.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/progs/samples/point.c b/progs/samples/point.c new file mode 100644 index 0000000000..4cb6ad7d51 --- /dev/null +++ b/progs/samples/point.c @@ -0,0 +1,234 @@ +/* + * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc. + * + * Permission to use, copy, modify, distribute, and sell this software and + * its documentation for any purpose is hereby granted without fee, provided + * that (i) the above copyright notices and this permission notice appear in + * all copies of the software and related documentation, and (ii) the name of + * Silicon Graphics may not be used in any advertising or + * publicity relating to the software without the specific, prior written + * permission of Silicon Graphics. + * + * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF + * ANY KIND, + * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY + * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. + * + * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR + * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, + * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, + * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF + * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <GL/glut.h> + + +#define CI_RED COLOR_RED +#define CI_ANTI_ALIAS_GREEN 16 +#define CI_ANTI_ALIAS_YELLOW 32 +#define CI_ANTI_ALIAS_RED 48 + + +GLenum rgb, doubleBuffer, windType; +GLint windW, windH; + +#include "tkmap.c" + +GLenum mode; +GLint size; +float point[3] = { + 1.0, 1.0, 0.0 +}; + + +static void Init(void) +{ + GLint i; + + glClearColor(0.0, 0.0, 0.0, 0.0); + + glBlendFunc(GL_SRC_ALPHA, GL_ZERO); + + if (!rgb) { + for (i = 0; i < 16; i++) { + glutSetColor(i+CI_ANTI_ALIAS_RED, i/15.0, 0.0, 0.0); + glutSetColor(i+CI_ANTI_ALIAS_YELLOW, i/15.0, i/15.0, 0.0); + glutSetColor(i+CI_ANTI_ALIAS_GREEN, 0.0, i/15.0, 0.0); + } + } + + mode = GL_FALSE; + size = 1; +} + +static void Reshape(int width, int height) +{ + + windW = (GLint)width; + windH = (GLint)height; + + glViewport(0, 0, width, height); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + gluOrtho2D(-windW/2, windW/2, -windH/2, windH/2); + glMatrixMode(GL_MODELVIEW); +} + +static void Key2(int key, int x, int y) +{ + + switch (key) { + case GLUT_KEY_LEFT: + point[0] -= 0.25; + break; + case GLUT_KEY_RIGHT: + point[0] += 0.25; + break; + case GLUT_KEY_UP: + point[1] += 0.25; + break; + case GLUT_KEY_DOWN: + point[1] -= 0.25; + break; + default: + return; + } + + glutPostRedisplay(); +} + +static void Key(unsigned char key, int x, int y) +{ + + switch (key) { + case 27: + exit(1); + case '1': + mode = !mode; + break; + case 'W': + size++; + break; + case 'w': + size--; + if (size < 1) { + size = 1; + } + break; + default: + return; + } + + glutPostRedisplay(); +} + +static void Draw(void) +{ + + glClear(GL_COLOR_BUFFER_BIT); + + SetColor(COLOR_YELLOW); + glBegin(GL_LINE_STRIP); + glVertex2f(-windW/2, 0); + glVertex2f(windW/2, 0); + glEnd(); + glBegin(GL_LINE_STRIP); + glVertex2f(0, -windH/2); + glVertex2f(0, windH/2); + glEnd(); + + if (mode) { + glEnable(GL_BLEND); + glEnable(GL_POINT_SMOOTH); + } else { + glDisable(GL_BLEND); + glDisable(GL_POINT_SMOOTH); + } + + glPointSize(size); + if (mode) { + (rgb) ? glColor3f(1.0, 0.0, 0.0) : glIndexf(CI_ANTI_ALIAS_RED); + } else { + (rgb) ? glColor3f(1.0, 0.0, 0.0) : glIndexf(CI_RED); + } + glBegin(GL_POINTS); + glVertex3fv(point); + glEnd(); + + glDisable(GL_POINT_SMOOTH); + glDisable(GL_BLEND); + + glPointSize(1); + SetColor(COLOR_GREEN); + glBegin(GL_POINTS); + glVertex3fv(point); + glEnd(); + + glFlush(); + + if (doubleBuffer) { + glutSwapBuffers(); + } +} + +static GLenum Args(int argc, char **argv) +{ + GLint i; + + rgb = GL_TRUE; + doubleBuffer = GL_FALSE; + + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "-ci") == 0) { + rgb = GL_FALSE; + } else if (strcmp(argv[i], "-rgb") == 0) { + rgb = GL_TRUE; + } else if (strcmp(argv[i], "-sb") == 0) { + doubleBuffer = GL_FALSE; + } else if (strcmp(argv[i], "-db") == 0) { + doubleBuffer = GL_TRUE; + } else { + printf("%s (Bad option).\n", argv[i]); + return GL_FALSE; + } + } + return GL_TRUE; +} + +int main(int argc, char **argv) +{ + glutInit(&argc, argv); + + if (Args(argc, argv) == GL_FALSE) { + exit(1); + } + + windW = 300; + windH = 300; + glutInitWindowPosition(0, 0); glutInitWindowSize( windW, windH); + + windType = (rgb) ? GLUT_RGB : GLUT_INDEX; + windType |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; + glutInitDisplayMode(windType); + + if (glutCreateWindow("Point Test") == GL_FALSE) { + exit(1); + } + + InitMap(); + + Init(); + + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutSpecialFunc(Key2); + glutDisplayFunc(Draw); + glutMainLoop(); + return 0; +} |