X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=scene.c;h=8b52285d89ac58a262add566cf61db38722edf26;hb=bbcc709acd8f62bd313215c7e71710f3ebcf01c0;hp=e608b44b1b56affab46f3bbe7c16376d2d2bac1d;hpb=75c5e22b2954a4b54923f322520a367c2af2d3c8;p=atyndall%2Fcits2231.git

diff --git a/scene.c b/scene.c
index e608b44..8b52285 100644
--- a/scene.c
+++ b/scene.c
@@ -460,17 +460,24 @@ void makeMenu() {
 
 /**
  * Called when window is resized
- * @param width New width
- * @param height New height
+ * @param w New width
+ * @param h New height
  */
-void windowReshape(int width, int height) {
-  glViewport(0, 0, (GLsizei)width, (GLsizei)height);
-  printf("Width: %d, height: %d\n", width, height);
+void windowReshape(int w, int h) {
+  GLdouble near = -10.0;
+  GLdouble far = 10.0;
+
+  glViewport(0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
-  gluPerspective( 60 * ((GLfloat)height/(GLfloat)width), (GLfloat)width/(GLfloat)height, 0.1, 1000.0);
-  glMatrixMode(GL_MODELVIEW);
-
+  if (w <= h) 
+    glOrtho(near, far, near*(GLfloat)h/(GLfloat)w,
+             far*(GLfloat)h/(GLfloat)w, near, far);
+  else
+    glOrtho(near*(GLfloat)w/(GLfloat)h,
+             far*(GLfloat)w/(GLfloat)h, near, far, near, far);
+   glMatrixMode(GL_MODELVIEW); 
+   glLoadIdentity();
 }
 
 /**
@@ -484,20 +491,87 @@ void mouse(int btn, int state, int x, int y) {
   
 }
 
+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)
+{
+  glDisable(GL_LIGHTING);
+
+  //if (useTexture) {
+  //  glEnable(GL_TEXTURE_2D);
+  //}
+
+  glBegin(GL_QUADS);
+    glTexCoord2f(0.0, 0.0);
+    glVertex3fv(floorVertices[0]);
+    glTexCoord2f(0.0, 16.0);
+    glVertex3fv(floorVertices[1]);
+    glTexCoord2f(16.0, 16.0);
+    glVertex3fv(floorVertices[2]);
+    glTexCoord2f(16.0, 0.0);
+    glVertex3fv(floorVertices[3]);
+  glEnd();
+
+  /*if (useTexture) {
+    glDisable(GL_TEXTURE_2D);
+  }*/
+
+  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();
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+  glLoadIdentity();
+
+  /* Reposition the light source. */
+  lightPosition[0] = 12*cos(lightAngle);
+  lightPosition[1] = lightHeight;
+  lightPosition[2] = 12*sin(lightAngle);
+  lightPosition[3] = 0.0;
+
+  glPushMatrix();
+    glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
 
-   glTranslatef(0.0f,0.0f,-10.0f); // Move into the Screen 10.0
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    drawFloor();
+    glDisable(GL_BLEND);
 
-   glutSolidTeapot(1);
+    glutSolidTeapot(1); // Draw teapot for test
 
-   glutSwapBuffers();
+    glPushMatrix();
+      glDisable(GL_LIGHTING);
+      glColor3f(1.0, 1.0, 0.0);
+
+      /* Draw a yellow ball at the light source. */
+      glTranslatef(lightPosition[0], lightPosition[1], lightPosition[2]);
+      glutSolidSphere(1.0, 5, 5);
+
+      glEnable(GL_LIGHTING);
+    glPopMatrix();
+
+  glPopMatrix();
+
+  glutSwapBuffers();
 }
 
+
 /**
  * Main function
  * @param argc Number of arguments
@@ -520,21 +594,48 @@ int main(int argc, char **argv) {
     glutInit(&argc, argv);
 
     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 Of Depth Test To Do
+    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
+   // glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);          // Really Nice Perspective Calculations
 
     glutReshapeFunc(windowReshape);
     glutDisplayFunc(display);
     glutMouseFunc(mouse);
 
     makeMenu();
+
+    //init();
+
+
+  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 */
+
+  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);
+
     glutMainLoop();
 }