X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=scene.c;h=c93b652c0d38b66041836d2cc6202b2bb094df4a;hb=445575ee93a4f400cbe4c89e844831ff3b3a76b9;hp=ff4b99be03196e44682382ac13673ae5e1a5b335;hpb=30c06bc0593c1c8a38de51effc1128cf6bc68d8b;p=atyndall%2Fcits2231.git

diff --git a/scene.c b/scene.c
index ff4b99b..c93b652 100644
--- a/scene.c
+++ b/scene.c
@@ -463,13 +463,31 @@ void makeMenu() {
  * @param width New width
  * @param height New height
  */
-void windowReshape(int width, int height) {
-  glViewport(0, 0, (GLsizei)width, (GLsizei)height);
+void windowReshape(int w, int h) {
+  /*glViewport(0, 0, (GLsizei)width, (GLsizei)height);
   printf("Width: %d, height: %d\n", width, height);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
-  gluPerspective(height / 60, (GLfloat)width / (GLfloat)height, 0.1, 1000.0);
+  gluPerspective( 60 * ((GLfloat)height/(GLfloat)width), (GLfloat)width/(GLfloat)height, 0.1, 1000.0);
   glMatrixMode(GL_MODELVIEW);
+
+  GLdouble near = 0.1;
+  GLdouble far = 1000.0;
+  GLdouble a = (GLfloat)height/(GLfloat)width;
+  GLdouble fov = 60;
+  glFrustum( -a*near*tan(fov/2),  a*near*tan(fov/2),  -a*near*tan(fov/2),  a*near*tan(fov/2), near, far  )*/
+  glViewport(0, 0, (GLsizei) w, (GLsizei) h); // what's GLsizei? Why is it called inside glViewPort?
+   glMatrixMode(GL_PROJECTION); // is it necessary to reset the projection matrix?
+   glLoadIdentity();
+   if (w <= h)  // is this calculation universal, could I use it on another program?
+      glOrtho(-5.0, 5.0, -5.0*(GLfloat)h/(GLfloat)w,
+               5.0*(GLfloat)h/(GLfloat)w, -5.0, 5.0);
+
+   else
+      glOrtho(-5.0*(GLfloat)w/(GLfloat)h,
+               5.0*(GLfloat)w/(GLfloat)h, -5.0, 5.0, -5.0, 5.0);
+   glMatrixMode(GL_MODELVIEW); // why do I set to GL_MODELVIEW at the end?
+   glLoadIdentity(); // why does it get a reset?
 }
 
 /**
@@ -490,7 +508,7 @@ void display() {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
 
-   glTranslatef(0.0f,0.0f,-10.0f); // Move into the Screen 10.0
+   glTranslatef(0.0f,0.0f,-4.0f); // Move into the Screen 10.0
 
    glutSolidTeapot(1);
 
@@ -535,5 +553,11 @@ int main(int argc, char **argv) {
     glutMouseFunc(mouse);
 
     makeMenu();
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    gluPerspective( 60, 1, 0.1, 1000.0);
+    glMatrixMode(GL_MODELVIEW);
+
     glutMainLoop();
 }