Changeset 7988 for code/branches/usability/src/orxonox

Timestamp:

Feb 27, 2011, 12:48:50 PM (14 years ago)

Author:

landauf

Message:

• FOV and pixel aspect ratio are now configurable
• aspect ratio and FOV of the camera are automatically adjusted if the window is resized (note: hud and gui still scale with the window which is fine I guess)
• the config value for FOV defines FOVx which is more convenient than FOVy
• default FOVx is now 80 degree (it was ~57.5 degree before, so the field of view is now much larger and the ship seems more distant).

Location:

code/branches/usability/src/orxonox/graphics

Files:

• Camera.cc (modified) (4 diffs)
• Camera.h (modified) (4 diffs)

code/branches/usability/src/orxonox/graphics/Camera.cc

@@ -69 +69 @@
         this->bHasFocus_ = false;
         this->bDrag_ = false;
-        this->nearClipDistance_ = 1;
         this->lastDtLagged_ = false;
 
@@ -75 +74 @@
 
         this->setConfigValues();
+
+        this->configvaluecallback_changedFovAndAspectRatio();
         this->configvaluecallback_changedNearClipDistance();
     }
@@ -97 +98 @@
     void Camera::setConfigValues()
     {
-        SetConfigValue(nearClipDistance_, 1.0f).callback(this, &Camera::configvaluecallback_changedNearClipDistance);
+        SetConfigValue(fov_, 80.0f)
+            .description("Horizontal field of view in degrees")
+            .callback(this, &Camera::configvaluecallback_changedFovAndAspectRatio);
+        SetConfigValue(aspectRatio_, 1.0f)
+            .description("Aspect ratio of pixels (width / height)")
+            .callback(this, &Camera::configvaluecallback_changedFovAndAspectRatio);
+        SetConfigValue(nearClipDistance_, 1.0f)
+            .description("Distance from the camera where close objects will be clipped")
+            .callback(this, &Camera::configvaluecallback_changedNearClipDistance);
+    }
+
+    /**
+        @brief Update FOV and the aspect ratio of the camera after the config values or the window's size have changed.
+    */
+    void Camera::configvaluecallback_changedFovAndAspectRatio()
+    {
+        // the aspect ratio of the window (width / height) has to be multiplied with the pixels aspect ratio (this->aspectRatio_)
+        float aspectRatio = this->aspectRatio_ * this->getWindowWidth() / this->getWindowHeight();
+        this->camera_->setAspectRatio(aspectRatio);
+
+        // Since we use horizontal FOV, we have to calculate FOVy by dividing by the aspect ratio and using some tangents
+        Radian fovy(2 * atan(tan(Degree(this->fov_).valueRadians() / 2) / aspectRatio));
+        this->camera_->setFOVy(fovy);
     }
 
@@ -103 +126 @@
     {
         this->camera_->setNearClipDistance(this->nearClipDistance_);
+    }
+
+    /**
+        @brief Inherited from WindowEventListener.
+    */
+    void Camera::windowResized(unsigned int newWidth, unsigned int newHeight)
+    {
+        this->configvaluecallback_changedFovAndAspectRatio();
     }
 

code/branches/usability/src/orxonox/graphics/Camera.h

@@ -33 +33 @@
 
 #include "util/OgreForwardRefs.h"
+#include "core/WindowEventListener.h"
 #include "tools/interfaces/Tickable.h"
 #include "tools/interfaces/TimeFactorListener.h"
@@ -39 +40 @@
 namespace orxonox
 {
-    class _OrxonoxExport Camera : public StaticEntity, public Tickable, public TimeFactorListener
+    class _OrxonoxExport Camera : public StaticEntity, public Tickable, public TimeFactorListener, public WindowEventListener
     {
         friend class CameraManager;
@@ -66 +67 @@
             void removeFocus();
             void setFocus();
+
+            void configvaluecallback_changedFovAndAspectRatio();
             void configvaluecallback_changedNearClipDistance();
+
+            void windowResized(unsigned int newWidth, unsigned int newHeight);
 
             Ogre::Camera*    camera_;
@@ -74 +79 @@
             bool             bDrag_;
             bool             lastDtLagged_;
+            float            fov_;
+            float            aspectRatio_;
     };
 }