From e4c84e7b74bcdf6a28d6b6e4491961c0933307b3 Mon Sep 17 00:00:00 2001
From: Jeffrey Ventrella <jeffreyventrella@gmail.com>
Date: Fri, 10 May 2013 21:58:11 -0700
Subject: [PATCH] added mouse view shift behaviors

---
 interface/src/main.cpp | 42 +++++++++++++++++++++++++++++++++++++++---
 1 file changed, 39 insertions(+), 3 deletions(-)

diff --git a/interface/src/main.cpp b/interface/src/main.cpp
index 5a9e262b5c..ca4db26c26 100644
--- a/interface/src/main.cpp
+++ b/interface/src/main.cpp
@@ -97,11 +97,20 @@ int packetsPerSecond = 0;
 int bytesPerSecond = 0;
 int bytesCount = 0;
 
+float mouseViewShiftYaw   = 0.0f;
+float mouseViewShiftPitch = 0.0f;
+
 int WIDTH = 1200; //  Window size
 int HEIGHT = 800;
 int fullscreen = 0;
 float aspectRatio = 1.0f;
 
+float MOUSE_VIEW_SHIFT_RATE         = 40.0f;
+float MOUSE_VIEW_SHIFT_YAW_MARGIN   = (float)(WIDTH  * 0.2f);
+float MOUSE_VIEW_SHIFT_PITCH_MARGIN = (float)(HEIGHT * 0.2f);
+float MOUSE_VIEW_SHIFT_YAW_LIMIT    = 45.0;
+float MOUSE_VIEW_SHIFT_PITCH_LIMIT  = 30.0;
+
 //CameraMode defaultCameraMode = CAMERA_MODE_FIRST_PERSON;
 CameraMode defaultCameraMode = CAMERA_MODE_THIRD_PERSON;
 
@@ -408,9 +417,34 @@ void updateAvatar(float deltaTime) {
         const float RENDER_PITCH_MULTIPLY = 4.f;
         myAvatar.setRenderPitch((1.f - renderPitchSpring * deltaTime) * myAvatar.getRenderPitch() +
                                 renderPitchSpring * deltaTime * -myAvatar.getHeadPitch() * RENDER_PITCH_MULTIPLY);
-
     }
     
+    
+    //make it so that when your mouse hits the edge of the screen, the camera shifts
+    float rightBoundary  = (float)WIDTH  - MOUSE_VIEW_SHIFT_YAW_MARGIN;
+    float bottomBoundary = (float)HEIGHT - MOUSE_VIEW_SHIFT_PITCH_MARGIN;
+    
+    if (mouseX > rightBoundary) {
+        float f = (mouseX - rightBoundary) / ( (float)WIDTH - rightBoundary);
+        mouseViewShiftYaw += MOUSE_VIEW_SHIFT_RATE * f * deltaTime;
+        if (mouseViewShiftYaw > MOUSE_VIEW_SHIFT_YAW_LIMIT) { mouseViewShiftYaw = MOUSE_VIEW_SHIFT_YAW_LIMIT; }
+    } else if (mouseX < MOUSE_VIEW_SHIFT_YAW_MARGIN) {
+        float f = 1.0 - (mouseX / MOUSE_VIEW_SHIFT_YAW_MARGIN);
+        mouseViewShiftYaw -= MOUSE_VIEW_SHIFT_RATE * f * deltaTime;
+        if (mouseViewShiftYaw < -MOUSE_VIEW_SHIFT_YAW_LIMIT) { mouseViewShiftYaw = -MOUSE_VIEW_SHIFT_YAW_LIMIT; }
+    }
+    if (mouseY < MOUSE_VIEW_SHIFT_PITCH_MARGIN) {
+        float f = 1.0 - (mouseY / MOUSE_VIEW_SHIFT_PITCH_MARGIN);
+        mouseViewShiftPitch += MOUSE_VIEW_SHIFT_RATE * f * deltaTime;
+        if ( mouseViewShiftPitch > MOUSE_VIEW_SHIFT_PITCH_LIMIT ) { mouseViewShiftPitch = MOUSE_VIEW_SHIFT_PITCH_LIMIT; }
+    }
+    else if (mouseY > bottomBoundary) {
+        float f = (mouseY - bottomBoundary) / ((float)HEIGHT - bottomBoundary);
+         mouseViewShiftPitch -= MOUSE_VIEW_SHIFT_RATE * f * deltaTime;
+        if (mouseViewShiftPitch < -MOUSE_VIEW_SHIFT_PITCH_LIMIT) { mouseViewShiftPitch = -MOUSE_VIEW_SHIFT_PITCH_LIMIT; }
+    }
+    
+    
     if (OculusManager::isConnected()) {
         float yaw, pitch, roll;
         OculusManager::getEulerAngles(yaw, pitch, roll);
@@ -1023,7 +1057,7 @@ void display(void)
                                            -myAvatar.getHeadPitch(),
                                            myAvatar.getHeadRoll());
             } else {
-                myCamera.setTargetRotation(myAvatar.getAbsoluteHeadYaw(), myAvatar.getAbsoluteHeadPitch(), 0.0f);
+                myCamera.setTargetRotation(myAvatar.getAbsoluteHeadYaw()- mouseViewShiftYaw, myAvatar.getAbsoluteHeadPitch() + mouseViewShiftPitch, 0.0f);
             }
         } else if (myCamera.getMode() == CAMERA_MODE_THIRD_PERSON) {
             myAvatar.setDisplayingHead(true);            
@@ -1031,7 +1065,7 @@ void display(void)
             myCamera.setDistance      (1.5f);
             myCamera.setTightness     (8.0f);
             myCamera.setTargetPosition(myAvatar.getHeadPosition());
-            myCamera.setTargetRotation(myAvatar.getBodyYaw(), 0.0f, 0.0f);
+            myCamera.setTargetRotation(myAvatar.getBodyYaw() - mouseViewShiftYaw, mouseViewShiftPitch, 0.0f);
         }
                 
         // important...
@@ -1788,6 +1822,8 @@ void idle(void) {
         // walking triggers the handControl to stop
         if (myAvatar.getMode() == AVATAR_MODE_WALKING) {
             handControl.stop();
+            mouseViewShiftYaw *= 0.9;
+            mouseViewShiftPitch *= 0.9;
         }
         
         //  Read serial port interface devices