зеркало из https://github.com/mozilla/gecko-dev.git
104 строки
2.9 KiB
C++
104 строки
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <math.h>
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#include "gfxVR.h"
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#include "mozilla/dom/Gamepad.h"
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#ifndef M_PI
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# define M_PI 3.14159265358979323846
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#endif
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using namespace mozilla;
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using namespace mozilla::gfx;
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Atomic<uint32_t> VRDisplayManager::sDisplayBase(0);
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Atomic<uint32_t> VRControllerManager::sControllerBase(0);
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/* static */ uint32_t
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VRDisplayManager::AllocateDisplayID()
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{
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return ++sDisplayBase;
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}
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Matrix4x4
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VRFieldOfView::ConstructProjectionMatrix(float zNear, float zFar,
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bool rightHanded) const
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{
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float upTan = tan(upDegrees * M_PI / 180.0);
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float downTan = tan(downDegrees * M_PI / 180.0);
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float leftTan = tan(leftDegrees * M_PI / 180.0);
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float rightTan = tan(rightDegrees * M_PI / 180.0);
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float handednessScale = rightHanded ? -1.0 : 1.0;
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float pxscale = 2.0f / (leftTan + rightTan);
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float pxoffset = (leftTan - rightTan) * pxscale * 0.5;
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float pyscale = 2.0f / (upTan + downTan);
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float pyoffset = (upTan - downTan) * pyscale * 0.5;
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Matrix4x4 mobj;
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float *m = &mobj._11;
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m[0*4+0] = pxscale;
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m[2*4+0] = pxoffset * handednessScale;
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m[1*4+1] = pyscale;
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m[2*4+1] = -pyoffset * handednessScale;
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m[2*4+2] = zFar / (zNear - zFar) * -handednessScale;
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m[3*4+2] = (zFar * zNear) / (zNear - zFar);
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m[2*4+3] = handednessScale;
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m[3*4+3] = 0.0f;
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return mobj;
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}
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/* static */ uint32_t
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VRControllerManager::AllocateControllerID()
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{
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return ++sControllerBase;
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}
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void
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VRControllerManager::AddGamepad(const char* aID,
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dom::GamepadMappingType aMapping,
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uint32_t aNumButtons, uint32_t aNumAxes)
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{
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dom::GamepadAdded a(NS_ConvertUTF8toUTF16(nsDependentCString(aID)), mControllerCount,
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aMapping, dom::GamepadServiceType::VR, aNumButtons,
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aNumAxes);
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VRManager* vm = VRManager::Get();
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MOZ_ASSERT(vm);
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vm->NotifyGamepadChange<dom::GamepadAdded>(a);
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}
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void
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VRControllerManager::NewButtonEvent(uint32_t aIndex, uint32_t aButton,
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bool aPressed)
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{
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dom::GamepadButtonInformation a(aIndex, dom::GamepadServiceType::VR,
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aButton, aPressed, aPressed ? 1.0L : 0.0L);
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VRManager* vm = VRManager::Get();
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MOZ_ASSERT(vm);
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vm->NotifyGamepadChange<dom::GamepadButtonInformation>(a);
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}
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void
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VRControllerManager::NewAxisMove(uint32_t aIndex, uint32_t aAxis,
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double aValue)
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{
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dom::GamepadAxisInformation a(aIndex, dom::GamepadServiceType::VR,
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aAxis, aValue);
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VRManager* vm = VRManager::Get();
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MOZ_ASSERT(vm);
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vm->NotifyGamepadChange<dom::GamepadAxisInformation>(a);
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}
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