X-Git-Url: https://git.ucc.asn.au/?p=atyndall%2Fcits2231.git;a=blobdiff_plain;f=scene.c;h=242a10482f0cfae27c4c01f2bda37e7f38bf4100;hp=c13268c2695ad0cfd18241a9c70324013e1bc342;hb=fbcff5fdddb4380b77f5cc4eb8a9419266fc1355;hpb=759c8b323c9020bde9a1006db2029413cbc3f99f

diff --git a/scene.c b/scene.c
index c13268c..242a104 100644
--- a/scene.c
+++ b/scene.c
@@ -109,6 +109,25 @@ char *dirDefault2 = "/cslinux/examples/CITS2231/project-files/models-textures";
 
 char dataDir[200];  // Stores the directory name for the meshes and textures.
 
+static GLfloat floorVertices[4][3] = {
+  { -1000.0, 0.0, 1000.0 },
+  { 1000.0, 0.0, 1000.0 },
+  { 1000.0, 0.0, -1000.0 },
+  { -1000.0, 0.0, -1000.0 },
+};
+
+static GLfloat lightColor[] = {1.0, 1.0, 1.0, 1.0}; // White light
+static GLfloat lightPosition[4];
+
+int moving, startx, starty;
+int lightMoving = 0, lightStartX, lightStartY;
+
+/* Time varying or user-controled variables. */
+static float jump = 0.0;
+static float lightAngle = 0.0, lightHeight = 20;
+GLfloat angle = -150;   /* in degrees */
+GLfloat angle2 = 30;   /* in degrees */
+
 /**
  * Prints out error message when file cannot be read
  * @param fileName Name of file that could not be read
@@ -487,28 +506,65 @@ void windowReshape(int w, int h) {
  * @param x Mouse x position
  * @param y Mouse y position
  */
-void mouse(int btn, int state, int x, int y) {
+/*void mouse(int btn, int state, int x, int y) {
   
+}*/
+static void
+mouse(int button, int state, int x, int y)
+{
+  if (button == GLUT_LEFT_BUTTON) {
+    if (state == GLUT_DOWN) {
+      moving = 1;
+      startx = x;
+      starty = y;
+    }
+    if (state == GLUT_UP) {
+      moving = 0;
+    }
+  }
+  if (button == GLUT_MIDDLE_BUTTON) {
+    if (state == GLUT_DOWN) {
+      lightMoving = 1;
+      lightStartX = x;
+      lightStartY = y;
+    }
+    if (state == GLUT_UP) {
+      lightMoving = 0;
+    }
+  }
 }
 
-static GLfloat floorVertices[4][3] = {
-  { -20.0, 0.0, 20.0 },
-  { 20.0, 0.0, 20.0 },
-  { 20.0, 0.0, -20.0 },
-  { -20.0, 0.0, -20.0 },
-};
-
-/* Draw a floor (possibly textured). */
 static void
-drawFloor(void)
+motion(int x, int y)
 {
+  if (moving) {
+    angle = angle + (x - startx);
+    angle2 = angle2 + (y - starty);
+    startx = x;
+    starty = y;
+    glutPostRedisplay();
+  }
+  if (lightMoving) {
+    lightAngle += (x - lightStartX)/40.0;
+    lightHeight += (lightStartY - y)/20.0;
+    lightStartX = x;
+    lightStartY = y;
+    glutPostRedisplay();
+  }
+}
+
+
+/**
+ * Draw a floor.
+ */
+void drawFloor() {
   glDisable(GL_LIGHTING);
 
   //if (useTexture) {
   //  glEnable(GL_TEXTURE_2D);
   //}
 
-  glBegin(GL_QUADS);
+  /*glBegin(GL_QUADS);
     glTexCoord2f(0.0, 0.0);
     glVertex3fv(floorVertices[0]);
     glTexCoord2f(0.0, 16.0);
@@ -517,7 +573,7 @@ drawFloor(void)
     glVertex3fv(floorVertices[2]);
     glTexCoord2f(16.0, 0.0);
     glVertex3fv(floorVertices[3]);
-  glEnd();
+  glEnd();*/
 
   /*if (useTexture) {
     glDisable(GL_TEXTURE_2D);
@@ -526,18 +582,17 @@ drawFloor(void)
   glEnable(GL_LIGHTING);
 }
 
-
-static GLfloat lightColor[] = {1.0, 1.0, 1.0, 1.0}; /* green-tinted */
-static GLfloat lightPosition[4];
-static float lightAngle = 0.0, lightHeight = 20;
-
-
 /**
  * Display function
  */
 void display() {
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glLoadIdentity();
+  gluLookAt(
+    0.0, 0.0, 60.0,  /* eye is at (x,y,z) */
+    0.0, 0.0,  0.0,  /* center is at (x,y,z) */
+    0.0, -1.0,  0.0   /* up is in postivie Y direction */
+    );
 
   /* Reposition the light source. */
   lightPosition[0] = 12*cos(lightAngle);
@@ -546,6 +601,10 @@ void display() {
   lightPosition[3] = 0.0;
 
   glPushMatrix();
+      /* Perform scene rotations based on user mouse input. */
+    glRotatef(angle2, 1.0, 0.0, 0.0);
+    glRotatef(angle, 0.0, 1.0, 0.0);
+
     glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
 
     glEnable(GL_BLEND);
@@ -553,11 +612,16 @@ void display() {
     drawFloor();
     glDisable(GL_BLEND);
 
-    glutSolidTeapot(1); // Draw teapot for test
+    glPushMatrix();
+    
+      //glTranslatef(0.0, 0.0, 0.0);
+ 
+      glutSolidTeapot(30); // Draw teapot for test
+    glPopMatrix();
 
     glPushMatrix();
       glDisable(GL_LIGHTING);
-      glColor3f(1.0, 1.0, 0.0);
+      glColor3f(1.0, 1.0, 1.0);
 
       /* Draw a yellow ball at the light source. */
       glTranslatef(lightPosition[0], lightPosition[1], lightPosition[2]);
@@ -571,6 +635,30 @@ void display() {
   glutSwapBuffers();
 }
 
+/**
+ * init function; sets initial OpenGL state
+ */
+void init() {
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+
+  gluPerspective(
+     60.0,  /* field of view in degree */
+      1.0,  /* aspect ratio */ 
+      0.0,  /* Z near */
+    900.0   /* Z far */
+    );    
+
+  glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, 1);
+  glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
+  glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 0.1);
+  glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.05);
+  glEnable(GL_LIGHT0);
+  glEnable(GL_LIGHTING);
+
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+}
 
 /**
  * Main function
@@ -579,64 +667,43 @@ void display() {
  * @return Program exit code
  */
 int main(int argc, char **argv) {
+  if(argc>1)
+    strcpy(dataDir, argv[1]);
+  else if(opendir(dirDefault1))
+    strcpy(dataDir, dirDefault1);
+  else if(opendir(dirDefault2))
+    strcpy(dataDir, dirDefault2);
+  else fileErr(dirDefault1);
 
-    if(argc>1)
-	  strcpy(dataDir, argv[1]);
-    else if(opendir(dirDefault1))
-	  strcpy(dataDir, dirDefault1);
-    else if(opendir(dirDefault2))
-      strcpy(dataDir, dirDefault2);
-    else fileErr(dirDefault1);
+  for(int i=0; i<NMESH; i++) meshes[i]=NULL;
+  for(int i=0; i<NTEXTURE; i++) textures[i]=NULL;
 
-    for(int i=0; i<NMESH; i++) meshes[i]=NULL;
-    for(int i=0; i<NTEXTURE; i++) textures[i]=NULL;
+  glutInit(&argc, argv);
 
-    glutInit(&argc, argv);
-
-    //glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
-
-  glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_STENCIL | GLUT_MULTISAMPLE);
-
-    glutInitWindowSize(500, 500);
-    glutCreateWindow("Scene Editor");
-
-    //glShadeModel(GL_SMOOTH); // Enables Smooth Shading
-    //glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Black Background
-    //glClearDepth(1.0f); // Depth Buffer Setup
-    //glEnable(GL_DEPTH_TEST); // Enables Depth Testing
-    //glDepthFunc(GL_LEQUAL);  // the type
-
-   // glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);          // Really Nice Perspective Calculations
-
-    glutReshapeFunc(windowReshape);
-    glutDisplayFunc(display);
-    glutMouseFunc(mouse);
-
-    makeMenu();
-
-    //init();
+  glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
 
+  glutInitWindowSize(500, 500);
+  glutCreateWindow("Scene Editor");
 
+  glShadeModel(GL_SMOOTH); // Enables Smooth Shading
+  glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Black Background
+  glClearDepth(1.0f); // Depth Buffer Setup
+  glEnable(GL_DEPTH_TEST); // Enables Depth Testing
+  glDepthFunc(GL_LEQUAL);  // the type
   glEnable(GL_CULL_FACE);
-  glEnable(GL_DEPTH_TEST);
   glEnable(GL_TEXTURE_2D);
   glLineWidth(3.0);
 
-glMatrixMode(GL_PROJECTION);
-  gluPerspective( /* field of view in degree */ 40.0,
-  /* aspect ratio */ 1.0,
-    /* Z near */ 20.0, /* Z far */ 100.0);
-  glMatrixMode(GL_MODELVIEW);
-  gluLookAt(0.0, 8.0, 60.0,  /* eye is at (0,8,60) */
-    0.0, 8.0, 0.0,      /* center is at (0,8,0) */
-    0.0, 1.0, 0.);      /* up is in postivie Y direction */
+  glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
 
-  glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, 1);
-  glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor);
-  glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 0.1);
-  glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.05);
-  glEnable(GL_LIGHT0);
-  glEnable(GL_LIGHTING);
+  glutReshapeFunc(windowReshape);
+  glutDisplayFunc(display);
+  glutMouseFunc(mouse);
+  glutMotionFunc(motion);
+
+  makeMenu();
+
+  init();
 
-    glutMainLoop();
+  glutMainLoop();
 }