From afb833d4e89c312460a4ab9ed6a7a8ca4ebbfe1c Mon Sep 17 00:00:00 2001 From: jtg Date: Thu, 19 Aug 1999 00:55:39 +0000 Subject: Initial revision --- progs/samples/select.c | 456 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 456 insertions(+) create mode 100644 progs/samples/select.c (limited to 'progs/samples/select.c') diff --git a/progs/samples/select.c b/progs/samples/select.c new file mode 100644 index 0000000000..5a73a457ab --- /dev/null +++ b/progs/samples/select.c @@ -0,0 +1,456 @@ +/* + * 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 +#include +#include +#include +#include +#include + + +#define MAXOBJS 10000 +#define MAXSELECT 100 +#define MAXFEED 300 +#define SOLID 1 +#define LINE 2 +#define POINT 3 + + +GLint windW, windH; + +GLuint selectBuf[MAXSELECT]; +GLfloat feedBuf[MAXFEED]; +GLint vp[4]; +float zRotation = 90.0; +float zoom = 1.0; +GLint objectCount; +GLint numObjects; +struct object { + float v1[2]; + float v2[2]; + float v3[2]; + float color[3]; +} objects[MAXOBJS]; +GLenum linePoly = GL_FALSE; + + +static void InitObjects(GLint num) +{ + GLint i; + float x, y; + + if (num > MAXOBJS) { + num = MAXOBJS; + } + if (num < 1) { + num = 1; + } + objectCount = num; + + srand((unsigned int)time(NULL)); + for (i = 0; i < num; i++) { + x = (rand() % 300) - 150; + y = (rand() % 300) - 150; + + objects[i].v1[0] = x + (rand() % 50) - 25; + objects[i].v2[0] = x + (rand() % 50) - 25; + objects[i].v3[0] = x + (rand() % 50) - 25; + objects[i].v1[1] = y + (rand() % 50) - 25; + objects[i].v2[1] = y + (rand() % 50) - 25; + objects[i].v3[1] = y + (rand() % 50) - 25; + objects[i].color[0] = ((rand() % 100) + 50) / 150.0; + objects[i].color[1] = ((rand() % 100) + 50) / 150.0; + objects[i].color[2] = ((rand() % 100) + 50) / 150.0; + } +} + +static void Init(void) +{ + + numObjects = 10; + InitObjects(numObjects); + glGetIntegerv(GL_VIEWPORT, vp); +} + +static void Reshape(int width, int height) +{ + + windW = (GLint)width; + windH = (GLint)height; +} + +static void Render(GLenum mode) +{ + GLint i; + + for (i = 0; i < objectCount; i++) { + if (mode == GL_SELECT) { + glLoadName(i); + } + glColor3fv(objects[i].color); + glBegin(GL_POLYGON); + glVertex2fv(objects[i].v1); + glVertex2fv(objects[i].v2); + glVertex2fv(objects[i].v3); + glEnd(); + } +} + +static GLint DoSelect(GLint x, GLint y) +{ + GLint hits; + + glSelectBuffer(MAXSELECT, selectBuf); + (void)glRenderMode(GL_SELECT); + glInitNames(); + glPushName(~0); + + glPushMatrix(); + + glViewport(0, 0, windW, windH); + glGetIntegerv(GL_VIEWPORT, vp); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + gluPickMatrix(x, windH-y, 4, 4, vp); + gluOrtho2D(-175, 175, -175, 175); + glMatrixMode(GL_MODELVIEW); + + glClearColor(0.0, 0.0, 0.0, 0.0); + glClear(GL_COLOR_BUFFER_BIT); + + glScalef(zoom, zoom, zoom); + glRotatef(zRotation, 0, 0, 1); + + Render(GL_SELECT); + + glPopMatrix(); + + hits = glRenderMode(GL_RENDER); + if (hits <= 0) { + return -1; + } + + return selectBuf[(hits-1)*4+3]; +} + +static void RecolorTri(GLint h) +{ + + objects[h].color[0] = ((rand() % 100) + 50) / 150.0; + objects[h].color[1] = ((rand() % 100) + 50) / 150.0; + objects[h].color[2] = ((rand() % 100) + 50) / 150.0; +} + +static void DeleteTri(GLint h) +{ + + objects[h] = objects[objectCount-1]; + objectCount--; +} + +static void GrowTri(GLint h) +{ + float v[2]; + float *oldV; + GLint i; + + v[0] = objects[h].v1[0] + objects[h].v2[0] + objects[h].v3[0]; + v[1] = objects[h].v1[1] + objects[h].v2[1] + objects[h].v3[1]; + v[0] /= 3; + v[1] /= 3; + + for (i = 0; i < 3; i++) { + switch (i) { + case 0: + oldV = objects[h].v1; + break; + case 1: + oldV = objects[h].v2; + break; + case 2: + oldV = objects[h].v3; + break; + } + oldV[0] = 1.5 * (oldV[0] - v[0]) + v[0]; + oldV[1] = 1.5 * (oldV[1] - v[1]) + v[1]; + } +} + +static void Mouse(int button, int state, int mouseX, int mouseY) +{ + GLint hit; + + if (state != GLUT_DOWN) + return; + + hit = DoSelect((GLint)mouseX, (GLint)mouseY); + if (hit != -1) { + if (button == GLUT_LEFT_BUTTON) { + RecolorTri(hit); + } + if (button == GLUT_MIDDLE_BUTTON) { + GrowTri(hit); + } + if (button == GLUT_RIGHT_BUTTON) { + DeleteTri(hit); + } + } + + glutPostRedisplay(); +} + +static void Draw(void) +{ + + glPushMatrix(); + + glViewport(0, 0, windW, windH); + glGetIntegerv(GL_VIEWPORT, vp); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + gluOrtho2D(-175, 175, -175, 175); + glMatrixMode(GL_MODELVIEW); + + glClearColor(0.0, 0.0, 0.0, 0.0); + glClear(GL_COLOR_BUFFER_BIT); + + glScalef(zoom, zoom, zoom); + glRotatef(zRotation, 0, 0, 1); + + Render(GL_RENDER); + + glPopMatrix(); + + glFlush(); +} + +static void DrawZoom(GLint x, GLint y) +{ + + glPushMatrix(); + + glViewport(0, 0, windW, windH); + glGetIntegerv(GL_VIEWPORT, vp); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + gluPickMatrix(x, windH-y, 4, 4, vp); + gluOrtho2D(-175, 175, -175, 175); + glMatrixMode(GL_MODELVIEW); + + glClearColor(0.0, 0.0, 0.0, 0.0); + glClear(GL_COLOR_BUFFER_BIT); + + glScalef(zoom, zoom, zoom); + glRotatef(zRotation, 0, 0, 1); + + Render(GL_RENDER); + + glPopMatrix(); +} + +static void DumpFeedbackVert(GLint *i, GLint n) +{ + GLint index; + + index = *i; + if (index+7 > n) { + *i = n; + printf(" ???\n"); + return; + } + printf(" (%g %g %g), color = (%4.2f %4.2f %4.2f)\n", + feedBuf[index], + feedBuf[index+1], + feedBuf[index+2], + feedBuf[index+3], + feedBuf[index+4], + feedBuf[index+5]); + index += 7; + *i = index; +} + +static void DrawFeedback(GLint n) +{ + GLint i; + GLint verts; + + printf("Feedback results (%d floats):\n", n); + for (i = 0; i < n; i++) { + switch ((GLint)feedBuf[i]) { + case GL_POLYGON_TOKEN: + printf("Polygon"); + i++; + if (i < n) { + verts = (GLint)feedBuf[i]; + i++; + printf(": %d vertices", verts); + } else { + verts = 0; + } + printf("\n"); + while (verts) { + DumpFeedbackVert(&i, n); + verts--; + } + i--; + break; + case GL_LINE_TOKEN: + printf("Line:\n"); + i++; + DumpFeedbackVert(&i, n); + DumpFeedbackVert(&i, n); + i--; + break; + case GL_LINE_RESET_TOKEN: + printf("Line Reset:\n"); + i++; + DumpFeedbackVert(&i, n); + DumpFeedbackVert(&i, n); + i--; + break; + default: + printf("%9.2f\n", feedBuf[i]); + break; + } + } + if (i == MAXFEED) { + printf("...\n"); + } + printf("\n"); +} + +static void DoFeedback(void) +{ + GLint x; + + glFeedbackBuffer(MAXFEED, GL_3D_COLOR, feedBuf); + (void)glRenderMode(GL_FEEDBACK); + + glPushMatrix(); + + glViewport(0, 0, windW, windH); + glGetIntegerv(GL_VIEWPORT, vp); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + gluOrtho2D(-175, 175, -175, 175); + glMatrixMode(GL_MODELVIEW); + + glClearColor(0.0, 0.0, 0.0, 0.0); + glClear(GL_COLOR_BUFFER_BIT); + + glScalef(zoom, zoom, zoom); + glRotatef(zRotation, 0, 0, 1); + + Render(GL_FEEDBACK); + + glPopMatrix(); + + x = glRenderMode(GL_RENDER); + if (x == -1) { + x = MAXFEED; + } + + DrawFeedback((GLint)x); +} + +static void Key2(int key, int x, int y) +{ + switch (key) { + case GLUT_KEY_LEFT: + zRotation += 0.5; + break; + case GLUT_KEY_RIGHT: + zRotation -= 0.5; + break; + default: + return; + } + + glutPostRedisplay(); +} + +static void Key(unsigned char key, int x, int y) +{ + switch (key) { + case 27: + exit(1); + case 'Z': + zoom /= 0.75; + break; + case 'z': + zoom *= 0.75; + break; + case 'f': + DoFeedback(); + break; + case 'd': + DrawZoom(x, y); + break; + case 'l': + linePoly = !linePoly; + if (linePoly) { + glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); + } else { + glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); + } + break; + default: + return; + } + + glutPostRedisplay(); +} + +int main(int argc, char **argv) +{ + GLenum type; + + glutInit(&argc, argv); + + windW = 300; + windH = 300; + glutInitWindowPosition(0, 0); glutInitWindowSize( windW, windH); + + type = GLUT_RGB | GLUT_SINGLE; + glutInitDisplayMode(type); + + if (glutCreateWindow("Select Test") == GL_FALSE) { + exit(1); + } + + Init(); + + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutSpecialFunc(Key2); + glutMouseFunc(Mouse); + glutDisplayFunc(Draw); + glutMainLoop(); + return 0; +} -- cgit v1.2.3