Orbit, zoom, pan fundamental viewport controls

[pravdomil]

Hello there I'm working on new input device to work with Fusion 360 via 3rd Addins.

And I'm searching for implementation of fundamental viewport controls (pan, zoom, orbit) in C++.

Does anybody have some idea how to do that? This is my code that does not work 😞

void orbit(Ptr& screenCoordinateCenter, double deltaX, double deltaY) {
    Ptr camera = app->activeViewport()->camera();
    camera->isSmoothTransition(false);
    
    Ptr eye = camera->eye();
    eye->x(eye->x() + deltaX);
    eye->y(eye->y() + deltaY);
    camera->eye(eye);
    
    app->activeViewport()->camera(camera);
    app->activeViewport()->refresh();
}

void pan(double deltaX, double deltaY) {
    Ptr camera = app->activeViewport()->camera();
    camera->isSmoothTransition(false);
    
    Ptr eye = camera->eye();
    eye->x(eye->x() + deltaX);
    eye->y(eye->y() + deltaY);
    camera->eye(eye);
    
    Ptr target = camera->target();
    target->x(target->x() + deltaX);
    target->y(target->y() + deltaY);
    camera->target(target);
    
    app->activeViewport()->camera(camera);
    app->activeViewport()->refresh();
}

[Anonymous]

Hello,

try this: simple move based on your code, I thing this is not bad point to start.

#include <Core/CoreAll.h>
#include <Fusion/FusionAll.h>
#include <CAM/CAMAll.h>

using namespace adsk::core;
using namespace adsk::fusion;
using namespace adsk::cam;

Ptr<Application> app;
Ptr<UserInterface> ui;



void orbit(Ptr<Camera> screenCoordinateCenter, double deltaX, double deltaY)
{
    Ptr<Camera> cam = screenCoordinateCenter;
    cam->isSmoothTransition(false);
    
    Ptr<Point3D> eye = cam->eye();
    eye->x(eye->x() + deltaX);
    eye->y(eye->y() + deltaY);
    cam->eye(eye);
    
    app->activeViewport()->camera(cam);
    app->activeViewport()->refresh();
}

void pan(double deltaX, double deltaY) {
    Ptr<Camera> cam = app->activeViewport()->camera();
    cam->isSmoothTransition(false);
    
    Ptr<Point3D> eye = cam->eye();
    eye->x(eye->x() + deltaX);
    eye->y(eye->y() + deltaY);
    cam->eye(eye);
    
    Ptr<Point3D> target = cam->target();
    target->x(target->x() + deltaX);
    target->y(target->y() + deltaY);
    cam->target(target);
    
    app->activeViewport()->camera(cam);
    app->activeViewport()->refresh();
}

void delay(int val)
{
    for(int i = 0; i < val; ++i)
    {
        for(int k = 0; k < val; ++k)
        {
            ;
        }
    }
}

extern "C" XI_EXPORT bool run(const char* context)
{
	app = Application::get();
	if (!app)
		return false;

	ui = app->userInterface();
	if (!ui)
		return false;

    ui->messageBox("About to start...");
    
    Ptr<Camera> camera1 = app->activeViewport()->camera();
    
    double x = 0;
    double y = 0;
    for(int i = 0; i < 90; ++i)
    {
        orbit(camera1, x, y);
//        delay(10);
        x += 1.0;
        y += 1.0;
    }
    
	ui->messageBox("Done");

	return true;
}

Goodluck.

Marek

[pravdomil]

Well try pan function, when you rotate camera it no longer goes in the same direction.