(no commit message)

[atyndall/cits2231.git] / scene.c

diff --git a/scene.c b/scene.c
index f55aa88..c93b652 100644 (file)
--- a/scene.c
+++ b/scene.c
@@ -1,9 +1,7 @@
-// compile this program using:\r
-//   gcc -O3 -Wall -std=c99 -o scene scene.c bitmap.c -lglut\r
-// Or, with cygwin:        (-mno-cygwin is only so the executable runs from windows)\r
-//   gcc -mno-cygwin -O3 -Wall -std=c99 -o scene scene.c bitmap.c -lglut32 -lglu32 -lopengl32\r
-// Or, use make via the supplied Makefile:     (For cygwin, install the package for make)\r
-//   make\r
+/**\r
+ * CITS2231 Graphics Scene Editor\r
+ * @author Ashley Tyndall (20915779)\r
+ */\r
 \r
 #include <stdlib.h>\r
 #include <stdio.h>\r
@@ -462,11 +460,34 @@ void makeMenu() {
 \r
 /**\r
  * Called when window is resized\r
- * @param w New width\r
- * @param h New height\r
+ * @param width New width\r
+ * @param height New height\r
  */\r
 void windowReshape(int w, int h) {\r
-\r
+  /*glViewport(0, 0, (GLsizei)width, (GLsizei)height);\r
+  printf("Width: %d, height: %d\n", width, height);\r
+  glMatrixMode(GL_PROJECTION);\r
+  glLoadIdentity();\r
+  gluPerspective( 60 * ((GLfloat)height/(GLfloat)width), (GLfloat)width/(GLfloat)height, 0.1, 1000.0);\r
+  glMatrixMode(GL_MODELVIEW);\r
+\r
+  GLdouble near = 0.1;\r
+  GLdouble far = 1000.0;\r
+  GLdouble a = (GLfloat)height/(GLfloat)width;\r
+  GLdouble fov = 60;\r
+  glFrustum( -a*near*tan(fov/2),  a*near*tan(fov/2),  -a*near*tan(fov/2),  a*near*tan(fov/2), near, far  )*/\r
+  glViewport(0, 0, (GLsizei) w, (GLsizei) h); // what's GLsizei? Why is it called inside glViewPort?\r
+   glMatrixMode(GL_PROJECTION); // is it necessary to reset the projection matrix?\r
+   glLoadIdentity();\r
+   if (w <= h)  // is this calculation universal, could I use it on another program?\r
+      glOrtho(-5.0, 5.0, -5.0*(GLfloat)h/(GLfloat)w,\r
+               5.0*(GLfloat)h/(GLfloat)w, -5.0, 5.0);\r
+\r
+   else\r
+      glOrtho(-5.0*(GLfloat)w/(GLfloat)h,\r
+               5.0*(GLfloat)w/(GLfloat)h, -5.0, 5.0, -5.0, 5.0);\r
+   glMatrixMode(GL_MODELVIEW); // why do I set to GL_MODELVIEW at the end?\r
+   glLoadIdentity(); // why does it get a reset?\r
 }\r
 \r
 /**\r
@@ -485,7 +506,13 @@ void mouse(int btn, int state, int x, int y) {
  */\r
 void display() {\r
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);\r
-   glFlush();\r
+   glLoadIdentity();\r
+\r
+   glTranslatef(0.0f,0.0f,-4.0f); // Move into the Screen 10.0\r
+\r
+   glutSolidTeapot(1);\r
+\r
+   glutSwapBuffers();\r
 }\r
 \r
 /**\r
@@ -512,11 +539,25 @@ int main(int argc, char **argv) {
     glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);\r
     glutInitWindowSize(500, 500);\r
     glutCreateWindow("Scene Editor");\r
+\r
+    glShadeModel(GL_SMOOTH);                        // Enables Smooth Shading\r
+    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);                   // Black Background\r
+    glClearDepth(1.0f);                         // Depth Buffer Setup\r
+    glEnable(GL_DEPTH_TEST);                        // Enables Depth Testing\r
+    glDepthFunc(GL_LEQUAL);                         // The Type Of Depth Test To Do\r
+\r
+    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);          // Really Nice Perspective Calculations\r
+\r
     glutReshapeFunc(windowReshape);\r
     glutDisplayFunc(display);\r
     glutMouseFunc(mouse);\r
-    glEnable(GL_DEPTH_TEST); // Enable hidden surface removal\r
 \r
     makeMenu();\r
+\r
+    glMatrixMode(GL_PROJECTION);\r
+    glLoadIdentity();\r
+    gluPerspective( 60, 1, 0.1, 1000.0);\r
+    glMatrixMode(GL_MODELVIEW);\r
+\r
     glutMainLoop();\r
 }\r