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rcbasic_runtime/camera.h
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258
rcbasic_runtime/camera.h
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#ifndef CAMERA_H_INCLUDED
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#define CAMERA_H_INCLUDED
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#include <irrlicht.h>
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#include <iostream>
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// use all irrlicht namespaces
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using namespace irr;
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using namespace core;
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using namespace scene;
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using namespace video;
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using namespace io;
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using namespace gui;
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/*
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==========
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rotateNode -- rotate a scene node locally
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==========
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*/
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void rotateNode(irr::scene::ISceneNode *node, irr::core::vector3df rot)
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{
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irr::core::matrix4 m;
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m.setRotationDegrees(node->getRotation());
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irr::core::matrix4 n;
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n.setRotationDegrees(rot);
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m *= n;
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node->setRotation( m.getRotationDegrees() );
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node->updateAbsolutePosition();
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}
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/*
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==========
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translateNode -- translate a scene node locally
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==========
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*/
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void translateNode(ISceneNode *node, vector3df vel)
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{
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irr::core::matrix4 m;
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m.setRotationDegrees(node->getRotation());
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m.transformVect(vel);
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node->setPosition(node->getPosition() + vel);
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node->updateAbsolutePosition();
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}
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void translateNodeW(ISceneNode *node, vector3df vel)
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{
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node->setPosition(node->getPosition() + vel);
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node->updateAbsolutePosition();
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}
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/* camera framework */
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class Camera
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{
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public:
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irr::scene::ISceneManager* Scene;
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irr::scene::ICameraSceneNode *camera; // the actual camera
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ISceneNode *top; // above camera
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ISceneNode *front; // in front of camera
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f32 rx,ry,rz;
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f32 x,y,z;
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vector3df direction;
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// initialize a camera at 0,0,0 or the location passed in
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void init(irr::scene::ISceneManager* smgr, float x=0, float y=0, float z=0);
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void re_init();
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// locally translate the camera
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void translate(float x, float y, float z);
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void translateW(float x, float y, float z);
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// locally rotate the camera
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void rotate(float x, float y, float z);
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// update the camera, should be called at the end of mainloop
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void update(void);
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// sets the global rotation of the camera
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void setRotation(float x, float y, float z);
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// sets the global position of the camera
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void setPosition(float x, float y, float z);
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// gets the global position of camera
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void getPosition(f32 &x, f32 &y, f32 &z);
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};
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// initialize a camera at 0,0,0 or the location passed in
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void Camera::init(irr::scene::ISceneManager* smgr, float x, float y, float z)
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{
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Scene = smgr;
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// create camera scene node
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camera = Scene->addCameraSceneNode(NULL, vector3df(x,y,z));
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// empty reference nodes
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top = Scene->addEmptySceneNode();
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front = Scene->addEmptySceneNode();
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// parent the reference nodes
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camera->addChild(top);
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camera->addChild(front);
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// put the reference nodes in place
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front->setPosition(vector3df(0,0,1));
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top->setPosition(vector3df(0,1,0));
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// set lookat
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camera->setUpVector(top->getAbsolutePosition() - camera->getAbsolutePosition());
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camera->setTarget(front->getAbsolutePosition() - camera->getAbsolutePosition());
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direction = vector3df(0,0,1);
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//camera = Scene->addCameraSceneNodeFPS();
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rx=ry=rz=0;
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x=y=z=0;
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}
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// initialize a camera at 0,0,0 or the location passed in
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void Camera::re_init()
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{
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//Scene = smgr;
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// create camera scene node
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//camera = Scene->addCameraSceneNode(NULL, vector3df(x,y,z));
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// empty reference nodes
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//top = Scene->addEmptySceneNode();
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//front = Scene->addEmptySceneNode();
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// parent the reference nodes
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//camera->addChild(top);
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//camera->addChild(front);
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// put the reference nodes in place
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front->setPosition(vector3df(0,0,1));
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top->setPosition(vector3df(0,1,0));
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// set lookat
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camera->setUpVector(top->getAbsolutePosition() - camera->getAbsolutePosition());
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camera->setTarget(front->getAbsolutePosition() - camera->getAbsolutePosition());
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direction = vector3df(0,0,1);
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//camera = Scene->addCameraSceneNodeFPS();
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rx=ry=rz=0;
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x=y=z=0;
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}
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// locally translate the camera
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void Camera::translate(float x, float y, float z)
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{
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// translate the camera locally
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translateNode(camera, vector3df(x,y,z));
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// update reference nodes
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front->updateAbsolutePosition();
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top->updateAbsolutePosition();
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}
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// locally translate the camera
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void Camera::translateW(float x, float y, float z)
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{
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// translate the camera locally
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translateNodeW(camera, vector3df(x,y,z));
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// update reference nodes
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front->updateAbsolutePosition();
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top->updateAbsolutePosition();
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}
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// locally rotate the camera
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void Camera::rotate(float x, float y, float z)
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{
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rotateNode(camera, vector3df(x, y, z));
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rx += x;
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ry += y;
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rz += z;
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}
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// update the camera, should be called at the end of mainloop
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void Camera::update(void)
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{
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camera->updateAbsolutePosition();
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camera->setTarget(front->getAbsolutePosition());
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camera->setUpVector(top->getAbsolutePosition() - camera->getAbsolutePosition());
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vector3df pos;
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pos = camera->getAbsolutePosition();
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x=pos.X;
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y=pos.Y;
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z=pos.Z;
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pos = camera->getRotation();
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//rx=pos.X;
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//ry=pos.Y;
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//rz=pos.Z;
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}
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// sets the global rotation of the camera
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void Camera::setRotation(float x, float y, float z)
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{
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camera->setRotation(vector3df(x,y,z));
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camera->updateAbsolutePosition();
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front->updateAbsolutePosition();
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top->updateAbsolutePosition();
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rx=x;
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ry=y;
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rz=z;
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}
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// sets the global position of the camera
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void Camera::setPosition(float x, float y, float z)
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{
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camera->setPosition(vector3df(x,y,z));
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camera->updateAbsolutePosition();
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front->updateAbsolutePosition();
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top->updateAbsolutePosition();
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}
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// gets the global position of camera
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void Camera::getPosition(f32 &x, f32 &y, f32 &z)
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{
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vector3df pos;
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pos = camera->getAbsolutePosition();
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x=pos.X;
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y=pos.Y;
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z=pos.Z;
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}
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#endif // CAMERA_H_INCLUDED
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