Tools::ManipWorld Class Reference

#include <manipworld.h>

List of all members.

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Detailed Description

Mouse handler to manipulate the world.

Manipulate the world, mouse translations and rotations are screen-axis aligned This object handles the modelview matrix, in your display function use:

        void display()
        {
          glClear(GL_COLOR_BUFFER_BIT | // erase last image on buffer
                  GL_DEPTH_BUFFER_BIT); // erase last z buffer
          
          glPushMatrix();
          manip.loadIdentityMatrix();

          // ... draw objects ...

          glPopMatrix();
        }

Rotate with:

        void mouse_motion(int x, int y)
        {
           manip.rotateXAxis(y - last_y);
           manip.rotateYAxis(x - last_x);
        }

To pick an object (also look into the Pick class):

        void mouse_click(int x, int y)
        {
           float pos[3];
           if( ManipWorld::pick(x, window_height-y, pos[0], pos[1], pos[2]) )
             // ... object picked at position -pos- ...
        }

Note that the mouse coordinate origin is on the lower left corner of the viewport

Public Member Functions
	ManipWorld ()
	~ManipWorld ()
void	init ()
void	translateAxis (float dx, float dy, float dz)
void	translate (float dx, float dy, float dz)
void	zoom (float zoom)
void	rotateXAxis (float delta)
void	rotateYAxis (float delta)
void	rotateZAxis (float delta)
void	rotateX (float delta)
void	rotateY (float delta)
void	rotateZ (float delta)
void	loadModelViewMatrix () const
void	loadInverseModelViewMatrix () const
void	saveModelViewMatrix ()
void	getModelViewMatrix (float m[]) const
void	setModelViewMatrix (const float m[])
Static Public Member Functions
static bool	pick (int mouse_x, int mouse_y, float &x, float &y, float &z)

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Constructor & Destructor Documentation

Tools::ManipWorld::ManipWorld

(

)

Tools::ManipWorld::~ManipWorld

(

)

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Member Function Documentation

void Tools::ManipWorld::init

(

)

Use identity matrix

void Tools::ManipWorld::translateAxis	(	float	dx,
		float	dy,
		float	dz
	)

translate camera (screen aligned translations)

Parameters:

	dx,dy	translate object parallel to the screen
	dz	move object in and outside the screen

void Tools::ManipWorld::translate	(	float	dx,
		float	dy,
		float	dz
	)

translate camera (world aligned translations)

Parameters:

dx,dy,dz

translate object in world distance

void Tools::ManipWorld::zoom

(

float

zoom

)

camera zoom

void Tools::ManipWorld::rotateXAxis

(

float

delta

)

Rotate verticaly, around the screen X axis

void Tools::ManipWorld::rotateYAxis

(

float

delta

)

Rotate horizontaly, around the screen Y axis

void Tools::ManipWorld::rotateZAxis

(

float

delta

)

Tilt camera, around the screen Z axis

void Tools::ManipWorld::rotateX

(

float

delta

)

Rotate around the world X axis

void Tools::ManipWorld::rotateY

(

float

delta

)

Rotate around the world Y axis

void Tools::ManipWorld::rotateZ

(

float

delta

)

Rotate around the world Z axis

void Tools::ManipWorld::loadModelViewMatrix

(

)

const

Load modelview matrix this actually rotate and translate the world

void Tools::ManipWorld::loadInverseModelViewMatrix

(

)

const

Load inverse of the modelview matrix it can be used to undo a manipulation

void Tools::ManipWorld::saveModelViewMatrix

(

)

Save the actual modelview matrix if the modelview if modified externally, this method will copy it to this manipulator

void Tools::ManipWorld::getModelViewMatrix

(

float

m[]

)

const

Get modelview matrix

void Tools::ManipWorld::setModelViewMatrix

(

const float

m[]

)

Set modelview matrix

static bool Tools::ManipWorld::pick	(	int	mouse_x,
		int	mouse_y,
		float &	x,
		float &	y,
		float &	z
	)			[static]

pick a 3D point at pixel (x,y) Assume the projection matrix is unchanged since last drawing This is a static method, so you can call it from anywhere If assumptions are wrong, use the class Pick

See also:

Pick

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The documentation for this class was generated from the following file:

• manipworld.h