Urho3D/Source/Samples/18_CharacterDemo/Touch.cpp
2020-01-05 06:21:40 +00:00

92 lines
3.5 KiB
C++

//
// Copyright (c) 2008-2020 the Urho3D project.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#include <Urho3D/Graphics/Graphics.h>
#include <Urho3D/Graphics/Renderer.h>
#include <Urho3D/Input/Controls.h>
#include <Urho3D/Input/Input.h>
#include "Character.h"
#include "Touch.h"
const float GYROSCOPE_THRESHOLD = 0.1f;
Touch::Touch(Context* context, float touchSensitivity) :
Object(context),
touchSensitivity_(touchSensitivity),
cameraDistance_(CAMERA_INITIAL_DIST),
zoom_(false),
useGyroscope_(false)
{
}
Touch::~Touch() = default;
void Touch::UpdateTouches(Controls& controls) // Called from HandleUpdate
{
zoom_ = false; // reset bool
auto* input = GetSubsystem<Input>();
// Zoom in/out
if (input->GetNumTouches() == 2)
{
TouchState* touch1 = input->GetTouch(0);
TouchState* touch2 = input->GetTouch(1);
// Check for zoom pattern (touches moving in opposite directions and on empty space)
if (!touch1->touchedElement_ && !touch2->touchedElement_ && ((touch1->delta_.y_ > 0 && touch2->delta_.y_ < 0) || (touch1->delta_.y_ < 0 && touch2->delta_.y_ > 0)))
zoom_ = true;
else
zoom_ = false;
if (zoom_)
{
int sens = 0;
// Check for zoom direction (in/out)
if (Abs(touch1->position_.y_ - touch2->position_.y_) > Abs(touch1->lastPosition_.y_ - touch2->lastPosition_.y_))
sens = -1;
else
sens = 1;
cameraDistance_ += Abs(touch1->delta_.y_ - touch2->delta_.y_) * sens * touchSensitivity_ / 50.0f;
cameraDistance_ = Clamp(cameraDistance_, CAMERA_MIN_DIST, CAMERA_MAX_DIST); // Restrict zoom range to [1;20]
}
}
// Gyroscope (emulated by SDL through a virtual joystick)
if (useGyroscope_ && input->GetNumJoysticks() > 0) // numJoysticks = 1 on iOS & Android
{
JoystickState* joystick = input->GetJoystickByIndex(0);
if (joystick->GetNumAxes() >= 2)
{
if (joystick->GetAxisPosition(0) < -GYROSCOPE_THRESHOLD)
controls.Set(CTRL_LEFT, true);
if (joystick->GetAxisPosition(0) > GYROSCOPE_THRESHOLD)
controls.Set(CTRL_RIGHT, true);
if (joystick->GetAxisPosition(1) < -GYROSCOPE_THRESHOLD)
controls.Set(CTRL_FORWARD, true);
if (joystick->GetAxisPosition(1) > GYROSCOPE_THRESHOLD)
controls.Set(CTRL_BACK, true);
}
}
}