Update Lua bindings for the camera

apps/openmw/mwbase/world.hpp

@@ -64,6 +64,7 @@ namespace MWRender
 {
     class Animation;
     class Camera;
+    class RenderingManager;
 }
 
 namespace MWMechanics
@@ -664,6 +665,8 @@ namespace MWBase
             virtual std::vector<MWWorld::Ptr> getAll(const std::string& id) = 0;
 
             virtual Misc::Rng::Generator& getPrng() = 0;
+
+            virtual MWRender::RenderingManager* getRenderingManager() = 0;
     };
 }
 

apps/openmw/mwlua/camerabindings.cpp

@@ -1,6 +1,10 @@
 #include "luabindings.hpp"
 
+#include <components/lua/utilpackage.hpp>
+#include <components/settings/settings.hpp>
+
 #include "../mwrender/camera.hpp"
+#include "../mwrender/renderingmanager.hpp"
 
 namespace MWLua
 {
@@ -10,6 +14,7 @@ namespace MWLua
     sol::table initCameraPackage(const Context& context)
     {
         MWRender::Camera* camera = MWBase::Environment::get().getWorld()->getCamera();
+        MWRender::RenderingManager* renderingManager = MWBase::Environment::get().getWorld()->getRenderingManager();
 
         sol::table api(context.mLua->sol(), sol::create);
         api["MODE"] = LuaUtil::makeReadOnly(context.mLua->sol().create_table_with(
@@ -77,6 +82,31 @@ namespace MWLua
         api["setFocalTransitionSpeed"] = [camera](float v) { camera->setFocalPointTransitionSpeed(v); };
         api["instantTransition"] = [camera]() { camera->instantTransition(); };
 
+        api["getCollisionType"] = [camera]() { return camera->getCollisionType(); };
+        api["setCollisionType"] = [camera](int collisionType) { camera->setCollisionType(collisionType); };
+
+        api["getBaseFieldOfView"] = []()
+        {
+            return osg::DegreesToRadians(std::clamp(Settings::Manager::getFloat("field of view", "Camera"), 1.f, 179.f));
+        };
+        api["getFieldOfView"] = [renderingManager]() { return osg::DegreesToRadians(renderingManager->getFieldOfView()); };
+        api["setFieldOfView"] = [renderingManager](float v) { renderingManager->setFieldOfView(osg::RadiansToDegrees(v)); };
+
+        api["getViewTransform"] = [camera]() { return LuaUtil::TransformM{camera->getViewMatrix()}; };
+
+        api["viewportToWorldVector"] = [camera, renderingManager](osg::Vec2f pos) -> osg::Vec3f
+        {
+            double width = Settings::Manager::getInt("resolution x", "Video");
+            double height = Settings::Manager::getInt("resolution y", "Video");
+            double aspect = (height == 0.0) ? 1.0 : width / height;
+            double fovTan = std::tan(osg::DegreesToRadians(renderingManager->getFieldOfView()) / 2);
+            osg::Matrixf invertedViewMatrix;
+            invertedViewMatrix.invert(camera->getViewMatrix());
+            float x = (pos.x() * 2 - 1) * aspect * fovTan;
+            float y = (1 - pos.y() * 2) * fovTan;
+            return invertedViewMatrix.preMult(osg::Vec3f(x, y, -1)) - camera->getPosition();
+        };
+
         return LuaUtil::makeReadOnly(api);
     }
 

apps/openmw/mwlua/luabindings.cpp

@@ -41,7 +41,7 @@ namespace MWLua
     {
         auto* lua = context.mLua;
         sol::table api(lua->sol(), sol::create);
-        api["API_REVISION"] = 19;
+        api["API_REVISION"] = 20;
         api["quit"] = [lua]()
         {
             Log(Debug::Warning) << "Quit requested by a Lua script.\n" << lua->debugTraceback();

apps/openmw/mwrender/camera.cpp

@@ -53,6 +53,7 @@ namespace MWRender
 
     Camera::Camera (osg::Camera* camera)
     : mHeightScale(1.f),
+      mCollisionType(MWPhysics::CollisionType::CollisionType_Default & ~MWPhysics::CollisionType::CollisionType_Actor),
       mCamera(camera),
       mAnimation(nullptr),
       mFirstPersonView(true),
@@ -127,6 +128,7 @@ namespace MWRender
             pos = calculateFirstPersonPosition(recalculatedTrackedPosition);
         }
         cam->setViewMatrixAsLookAt(pos, pos + forward, up);
+        mViewMatrix = cam->getViewMatrix();
     }
 
     void Camera::update(float duration, bool paused)
@@ -174,7 +176,6 @@ namespace MWRender
         constexpr float focalObstacleLimit = 10.f;
 
         const auto* rayCasting = MWBase::Environment::get().getWorld()->getRayCasting();
-        constexpr int collisionType = (MWPhysics::CollisionType::CollisionType_Default & ~MWPhysics::CollisionType::CollisionType_Actor);
 
         // Adjust focal point to prevent clipping.
         osg::Vec3d focalOffset = getFocalPointOffset();
@@ -184,7 +185,7 @@ namespace MWRender
         float offsetLen = focalOffset.length();
         if (offsetLen > 0)
         {
-            MWPhysics::RayCastingResult result = rayCasting->castSphere(focal - focalOffset, focal, focalObstacleLimit, collisionType);
+            MWPhysics::RayCastingResult result = rayCasting->castSphere(focal - focalOffset, focal, focalObstacleLimit, mCollisionType);
             if (result.mHit)
             {
                 double adjustmentCoef = -(result.mHitPos + result.mHitNormal * focalObstacleLimit - focal).length() / offsetLen;
@@ -196,7 +197,7 @@ namespace MWRender
         mCameraDistance = mPreferredCameraDistance;
         osg::Quat orient =  osg::Quat(mPitch + mExtraPitch, osg::Vec3d(1,0,0)) * osg::Quat(mYaw + mExtraYaw, osg::Vec3d(0,0,1));
         osg::Vec3d offset = orient * osg::Vec3d(0.f, -mCameraDistance, 0.f);
-        MWPhysics::RayCastingResult result = rayCasting->castSphere(focal, focal + offset, cameraObstacleLimit, collisionType);
+        MWPhysics::RayCastingResult result = rayCasting->castSphere(focal, focal + offset, cameraObstacleLimit, mCollisionType);
         if (result.mHit)
         {
             mCameraDistance = (result.mHitPos + result.mHitNormal * cameraObstacleLimit - focal).length();
@@ -211,7 +212,7 @@ namespace MWRender
         if (mMode == newMode)
             return;
         Mode oldMode = mMode;
-        if (!force && (newMode == Mode::FirstPerson || oldMode == Mode::FirstPerson) && !mAnimation->upperBodyReady())
+        if (!force && (newMode == Mode::FirstPerson || oldMode == Mode::FirstPerson) && mAnimation && !mAnimation->upperBodyReady())
         {
             // Changing the view will stop all playing animations, so if we are playing
             // anything important, queue the view change for later

apps/openmw/mwrender/camera.hpp

@@ -5,6 +5,7 @@
 #include <string>
 
 #include <osg/ref_ptr>
+#include <osg/Matrix>
 #include <osg/Vec3>
 #include <osg/Vec3d>
 
@@ -95,11 +96,17 @@ namespace MWRender
         void setFirstPersonOffset(const osg::Vec3f& v) { mFirstPersonOffset = v; }
         osg::Vec3f getFirstPersonOffset() const { return mFirstPersonOffset; }
 
+        int getCollisionType() const { return mCollisionType; }
+        void setCollisionType(int collisionType) { mCollisionType = collisionType; }
+
+        const osg::Matrixf& getViewMatrix() const { return mViewMatrix; }
+
     private:
         MWWorld::Ptr mTrackingPtr;
         osg::ref_ptr<const osg::Node> mTrackingNode;
         osg::Vec3d mTrackedPosition;
         float mHeightScale;
+        int mCollisionType;
 
         osg::ref_ptr<osg::Camera> mCamera;
 
@@ -121,6 +128,7 @@ namespace MWRender
         float mExtraPitch = 0, mExtraYaw = 0;
         bool mLockPitch = false, mLockYaw = false;
         osg::Vec3d mPosition;
+        osg::Matrixf mViewMatrix;
 
         float mCameraDistance, mPreferredCameraDistance;
 

apps/openmw/mwrender/renderingmanager.cpp

@@ -817,6 +817,11 @@ namespace MWRender
         updateNavMesh();
         updateRecastMesh();
 
+        if (mUpdateProjectionMatrix)
+        {
+            mUpdateProjectionMatrix = false;
+            updateProjectionMatrix();
+        }
         mCamera->update(dt, paused);
 
         bool isUnderwater = mWater->isUnderwater(mCamera->getPosition());
@@ -1161,8 +1166,7 @@ namespace MWRender
 
         // Since our fog is not radial yet, we should take FOV in account, otherwise terrain near viewing distance may disappear.
         // Limit FOV here just for sure, otherwise viewing distance can be too high.
-        fov = std::min(mFieldOfView, 140.f);
+        float distanceMult = std::cos(osg::DegreesToRadians(std::min(fov, 140.f))/2.f);
-        float distanceMult = std::cos(osg::DegreesToRadians(fov)/2.f);
         mTerrain->setViewDistance(mViewDistance * (distanceMult ? 1.f/distanceMult : 1.f));
     }
 
@@ -1300,6 +1304,17 @@ namespace MWRender
         }
     }
 
+    void RenderingManager::setFieldOfView(float val)
+    {
+        mFieldOfView = val;
+        mUpdateProjectionMatrix = true;
+    }
+
+    float RenderingManager::getFieldOfView() const
+    {
+        return mFieldOfViewOverridden ? mFieldOfViewOverridden : mFieldOfView;
+    }
+
     osg::Vec3f RenderingManager::getHalfExtents(const MWWorld::ConstPtr& object) const
     {
         osg::Vec3f halfExtents(0, 0, 0);

apps/openmw/mwrender/renderingmanager.hpp

@@ -214,6 +214,8 @@ namespace MWRender
 
         /// temporarily override the field of view with given value.
         void overrideFieldOfView(float val);
+        void setFieldOfView(float val);
+        float getFieldOfView() const;
         /// reset a previous overrideFieldOfView() call, i.e. revert to field of view specified in the settings file.
         void resetFieldOfView();
 
@@ -301,6 +303,7 @@ namespace MWRender
         float mFieldOfViewOverride;
         float mFieldOfView;
         float mFirstPersonFieldOfView;
+        bool mUpdateProjectionMatrix = false;
 
         void operator = (const RenderingManager&);
         RenderingManager(const RenderingManager&);

apps/openmw/mwworld/worldimp.hpp

@@ -743,6 +743,8 @@ namespace MWWorld
             std::vector<MWWorld::Ptr> getAll(const std::string& id) override;
 
             Misc::Rng::Generator& getPrng() override;
+
+            MWRender::RenderingManager* getRenderingManager() override { return mRendering.get(); }
     };
 }
 

files/builtin_scripts/scripts/omw/camera.lua

@@ -4,6 +4,7 @@ local input = require('openmw.input')
 local settings = require('openmw.settings')
 local util = require('openmw.util')
 local self = require('openmw.self')
+local nearby = require('openmw.nearby')
 
 local Actor = require('openmw.types').Actor
 
@@ -23,6 +24,8 @@ local noHeadBobbing = 0
 local noZoom = 0
 
 local function init()
+    camera.setCollisionType(util.bitAnd(nearby.COLLISION_TYPE.Default, util.bitNot(nearby.COLLISION_TYPE.Actor)))
+    camera.setFieldOfView(camera.getBaseFieldOfView())
     camera.allowCharacterDeferredRotation(settings._getBoolFromSettingsCfg('Camera', 'deferred preview rotation'))
     if camera.getMode() == MODE.FirstPerson then
         primaryMode = MODE.FirstPerson

files/builtin_scripts/scripts/omw/third_person.lua

@@ -78,6 +78,8 @@ local function updateState()
         state = STATE.Swimming
     elseif oldState == STATE.Combat or oldState == STATE.Swimming then
         state = defaultShoulder
+    elseif not state then
+        state = defaultShoulder
     end
     if autoSwitchShoulder and (mode == MODE.ThirdPerson or state ~= oldState or noThirdPersonLastFrame)
        and (state == STATE.LeftShoulder or state == STATE.RightShoulder) then

files/lua_api/openmw/camera.lua

@@ -166,6 +166,36 @@
 -- Make instant the current transition of camera focal point and the current deferred rotation (see `allowCharacterDeferredRotation`).
 -- @function [parent=#camera] instantTransition
 
+--- Get current camera collision type (see @{openmw.nearby#COLLISION_TYPE}).
+-- @function [parent=#camera] getCollisionType
+-- @return #number
+
+--- Set camera collision type (see @{openmw.nearby#COLLISION_TYPE}).
+-- @function [parent=#camera] setCollisionType
+-- @param #number collisionType
+
+--- Return base field of view vertical angle in radians
+-- @function [parent=#camera] getBaseFieldOfView
+-- @return #number
+
+--- Return current field of view vertical angle in radians
+-- @function [parent=#camera] getFieldOfView
+-- @return #number
+
+--- Set field of view
+-- @function [parent=#camera] setFieldOfView
+-- @param #number fov Field of view vertical angle in radians
+
+--- Get world to local transform for the camera.
+-- @function [parent=#camera] getViewTransform
+-- @return openmw.util#Transform
+
+--- Get vector from the camera to the world for the given point in viewport.
+-- (0, 0) is the top left corner of the screen.
+-- @function [parent=#camera] viewportToWorldVector
+-- @param openmw.util#Vector2 normalizedScreenPos
+-- @return openmw.util#Vector3
+
 
 return nil