X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=scene.c;h=6c9540ae85e4a69cb87c5da9cdc8285d6845c088;hb=59ab0befd5f3d6ea6a2b72aeeb045ab93103995a;hp=e2d17e682e7f50682271248993f76fd788b7d48b;hpb=36e1679e77db07de3b54b6054b118607112c360e;p=atyndall%2Fcits2231.git

diff --git a/scene.c b/scene.c
index e2d17e6..6c9540a 100644
--- a/scene.c
+++ b/scene.c
@@ -527,6 +527,11 @@ drawFloor(void)
 }
 
 
+static GLfloat lightColor[] = {0.8, 1.0, 0.8, 1.0}; /* green-tinted */
+static GLfloat lightPosition[4];
+static float lightAngle = 0.0, lightHeight = 20;
+
+
 /**
  * Display function
  */
@@ -534,25 +539,66 @@ void display() {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
 
-   glTranslatef( 0.0f,  0.0f,  0.0f);
+   /*glTranslatef( 0.0f,  0.0f,  0.0f);
    glBegin(GL_QUADS);
      glVertex3f( 0.0f,  1.0f, -1.0f);
      glVertex3f( 0.0f,  1.0f,  1.0f);
      glVertex3f( 0.0f, -1.0f,  1.0f);
      glVertex3f( 0.0f, -1.0f, -1.0f);
-   glEnd();
+   glEnd();*/
 
 
-   glTranslatef( 0.0f, 0.0f, -5.0f); // Move into the Screen 10.0
-   glutSolidTeapot(1);
+   //glTranslatef( 0.0f, 0.0f, -5.0f); // Move into the Screen 10.0
+   //glutSolidTeapot(1);
 
-   /*glMatrixMode(GL_MODELVIEW);
+  /* glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    gluLookAt(0.7f, 0.4f, 0.9f, -2.0f, -1.0f, -7.0f, 1.0f, 10.0f, 1.0f);
 
 
    glMatrixMode(GL_PROJECTION);
   glLoadIdentity();*/
+
+
+   /* Reposition the light source. */
+  lightPosition[0] = 12*cos(lightAngle);
+  lightPosition[1] = lightHeight;
+  lightPosition[2] = 12*sin(lightAngle);
+  //if (directionalLight) {
+    lightPosition[3] = 0.0;
+  //} else {
+  //  lightPosition[3] = 1.0;
+  //}
+
+    glPushMatrix();
+
+    /* Tell GL new light source position. */
+    glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);
+
+       /* Draw "bottom" of floor in blue. */
+    glFrontFace(GL_CW);  /* Switch face orientation. */
+    glColor4f(0.1, 0.1, 0.7, 1.0);
+    drawFloor();
+    glFrontFace(GL_CCW);
+
+        /* Draw "top" of floor.  Use blending to blend in reflection. */
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glColor4f(0.7, 0.0, 0.0, 0.3);
+    glColor4f(1.0, 1.0, 1.0, 0.3);
+    drawFloor();
+    glDisable(GL_BLEND);
+
+        glPushMatrix();
+    glDisable(GL_LIGHTING);
+
+     /* Draw a yellow ball at the light source. */
+      glTranslatef(lightPosition[0], lightPosition[1], lightPosition[2]);
+      glutSolidSphere(1.0, 5, 5);
+
+          glEnable(GL_LIGHTING);
+    glPopMatrix();
+
    drawFloor();
    glutSwapBuffers();
 }
@@ -567,6 +613,7 @@ void init() {
   glMatrixMode(GL_MODELVIEW);
 }
 
+
 /**
  * Main function
  * @param argc Number of arguments
@@ -598,7 +645,7 @@ int main(int argc, char **argv) {
     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);
@@ -608,5 +655,21 @@ int main(int argc, char **argv) {
 
     init();
 
+     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();
 }