(no commit message)

diff --git a/scene.c b/scene.c
index eb5c537..15d8f9d 100644 (file)
--- a/scene.c
+++ b/scene.c
@@ -118,7 +118,15 @@ static GLfloat floorVertices[4][3] = {
 \r
 static GLfloat lightColor[] = {1.0, 1.0, 1.0, 1.0}; // White light\r
 static GLfloat lightPosition[4];\r
-static float lightAngle = 10.0, lightHeight = 20;\r
+\r
+int moving, startx, starty;\r
+int lightMoving = 0, lightStartX, lightStartY;\r
+\r
+/* Time varying or user-controled variables. */\r
+static float jump = 0.0;\r
+static float lightAngle = 0.0, lightHeight = 20;\r
+GLfloat angle = -150;   /* in degrees */\r
+GLfloat angle2 = 30;   /* in degrees */\r
 \r
 /**\r
  * Prints out error message when file cannot be read\r
@@ -498,10 +506,54 @@ void windowReshape(int w, int h) {
  * @param x Mouse x position\r
  * @param y Mouse y position\r
  */\r
-void mouse(int btn, int state, int x, int y) {\r
+/*void mouse(int btn, int state, int x, int y) {\r
   \r
+}*/\r
+static void\r
+mouse(int button, int state, int x, int y)\r
+{\r
+  if (button == GLUT_LEFT_BUTTON) {\r
+    if (state == GLUT_DOWN) {\r
+      moving = 1;\r
+      startx = x;\r
+      starty = y;\r
+    }\r
+    if (state == GLUT_UP) {\r
+      moving = 0;\r
+    }\r
+  }\r
+  if (button == GLUT_MIDDLE_BUTTON) {\r
+    if (state == GLUT_DOWN) {\r
+      lightMoving = 1;\r
+      lightStartX = x;\r
+      lightStartY = y;\r
+    }\r
+    if (state == GLUT_UP) {\r
+      lightMoving = 0;\r
+    }\r
+  }\r
 }\r
 \r
+static void\r
+motion(int x, int y)\r
+{\r
+  if (moving) {\r
+    angle = angle + (x - startx);\r
+    angle2 = angle2 + (y - starty);\r
+    startx = x;\r
+    starty = y;\r
+    glutPostRedisplay();\r
+  }\r
+  if (lightMoving) {\r
+    lightAngle += (x - lightStartX)/40.0;\r
+    lightHeight += (lightStartY - y)/20.0;\r
+    lightStartX = x;\r
+    lightStartY = y;\r
+    glutPostRedisplay();\r
+  }\r
+}\r
+\r
+\r
 /**\r
  * Draw a floor.\r
  */\r
@@ -539,7 +591,7 @@ void display() {
   gluLookAt(\r
     0.0, 0.0, 60.0,  /* eye is at (x,y,z) */\r
     0.0, 0.0,  0.0,  /* center is at (x,y,z) */\r
-    0.0, 1.0,  1.0   /* up is in postivie Y direction */\r
+    0.0, 1.0,  0.0   /* up is in postivie Y direction */\r
     );\r
 \r
   /* Reposition the light source. */\r
@@ -549,6 +601,10 @@ void display() {
   lightPosition[3] = 0.0;\r
 \r
   glPushMatrix();\r
+      /* Perform scene rotations based on user mouse input. */\r
+    glRotatef(angle2, 1.0, 0.0, 0.0);\r
+    glRotatef(angle, 0.0, 1.0, 0.0);\r
+\r
     glLightfv(GL_LIGHT0, GL_POSITION, lightPosition);\r
 \r
     glEnable(GL_BLEND);\r
@@ -643,6 +699,7 @@ int main(int argc, char **argv) {
   glutReshapeFunc(windowReshape);\r
   glutDisplayFunc(display);\r
   glutMouseFunc(mouse);\r
+  glutMotionFunc(motion);\r
 \r
   makeMenu();\r
 \r