Import Mesa 6.5.1 (MesaLib, MesaDemos, MesaGLUT).

1 files changed, 456 insertions, 0 deletions

diff --git a/progs/samples/select.c b/progs/samples/select.c
new file mode 100644
index 00000000000..2c8f333bfa9
--- /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 <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <time.h>
+#include <GL/glut.h>
+
+
+#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 = NULL;
+    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;
+}