mirror of
https://github.com/scratchfoundation/bgfx.git
synced 2024-11-25 00:58:30 -05:00
1e604e8f38
BREAKING: bgfx::getHMD() now returns a valid pointer
if the VR runtime was initialized. This is different
from existing behavior where getHMD returned NULL until
a bgfx::reset(... BGFX_RESET_HMD) was issued. Applications
must now check HMD::flags for the current state of the VR
runtime. The following code has the code change required:
`const bgfx::HMD* hmd = bgfx::getHMD()
if (NULL != hmd)`
becomes:
`const bgfx::HMD* hmd = bgfx::getHMD()
if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDRERING))
{
// rendering logic
}`
See the updated examples for details.
This allows applications to create the appropriately
sized back buffer for the HMD device by using the new device
resolution fields HMD::deviceHeight and HMD::deviceWidth.
These values report the pixel resolution of the attached
HMD hardware.
This also allows applications to query the reported HMD
resolution immediately after bgfx::init. This prevents
the device from being cycled which generates rendring
artifacts on startup - namely flashing back to a black
screen and reseting the Health+Warning disaply.
This involves initialization the ovrHmd device on
initialization, but deferring rendering until
postReset has been called. This adds an addiional
memory overhead of 32k to builds defining BGFX_CONFIG_USE_OVR.
The overhead for current builds is ~1.9MB for calls to
ovr_Initialize, so the additional overhead is pretty
trivial (+1.8%)
121 lines
3 KiB
C++
121 lines
3 KiB
C++
/*
|
|
* Copyright 2011-2015 Branimir Karadzic. All rights reserved.
|
|
* License: http://www.opensource.org/licenses/BSD-2-Clause
|
|
*/
|
|
|
|
#include "common.h"
|
|
#include "bgfx_utils.h"
|
|
|
|
int _main_(int /*_argc*/, char** /*_argv*/)
|
|
{
|
|
uint32_t width = 1280;
|
|
uint32_t height = 720;
|
|
uint32_t debug = BGFX_DEBUG_TEXT;
|
|
uint32_t reset = BGFX_RESET_VSYNC;
|
|
|
|
bgfx::init();
|
|
bgfx::reset(width, height, reset);
|
|
|
|
// Enable debug text.
|
|
bgfx::setDebug(debug);
|
|
|
|
// Set view 0 clear state.
|
|
bgfx::setViewClear(0
|
|
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
|
|
, 0x303030ff
|
|
, 1.0f
|
|
, 0
|
|
);
|
|
|
|
bgfx::UniformHandle u_time = bgfx::createUniform("u_time", bgfx::UniformType::Vec4);
|
|
|
|
// Create program from shaders.
|
|
bgfx::ProgramHandle program = loadProgram("vs_mesh", "fs_mesh");
|
|
|
|
Mesh* mesh = meshLoad("meshes/bunny.bin");
|
|
|
|
int64_t timeOffset = bx::getHPCounter();
|
|
|
|
while (!entry::processEvents(width, height, debug, reset) )
|
|
{
|
|
// Set view 0 default viewport.
|
|
bgfx::setViewRect(0, 0, 0, width, height);
|
|
|
|
// This dummy draw call is here to make sure that view 0 is cleared
|
|
// if no other draw calls are submitted to view 0.
|
|
bgfx::submit(0);
|
|
|
|
int64_t now = bx::getHPCounter();
|
|
static int64_t last = now;
|
|
const int64_t frameTime = now - last;
|
|
last = now;
|
|
const double freq = double(bx::getHPFrequency() );
|
|
const double toMs = 1000.0/freq;
|
|
float time = (float)( (bx::getHPCounter()-timeOffset)/double(bx::getHPFrequency() ) );
|
|
bgfx::setUniform(u_time, &time);
|
|
|
|
// Use debug font to print information about this example.
|
|
bgfx::dbgTextClear();
|
|
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/04-mesh");
|
|
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Loading meshes.");
|
|
bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
|
|
|
|
float at[3] = { 0.0f, 1.0f, 0.0f };
|
|
float eye[3] = { 0.0f, 1.0f, -2.5f };
|
|
|
|
// Set view and projection matrix for view 0.
|
|
const bgfx::HMD* hmd = bgfx::getHMD();
|
|
if (NULL != hmd && 0 != (hmd->flags & BGFX_HMD_RENDERING))
|
|
{
|
|
float view[16];
|
|
bx::mtxQuatTranslationHMD(view, hmd->eye[0].rotation, eye);
|
|
|
|
float proj[16];
|
|
bx::mtxProj(proj, hmd->eye[0].fov, 0.1f, 100.0f);
|
|
|
|
bgfx::setViewTransform(0, view, proj);
|
|
|
|
// Set view 0 default viewport.
|
|
//
|
|
// Use HMD's width/height since HMD's internal frame buffer size
|
|
// might be much larger than window size.
|
|
bgfx::setViewRect(0, 0, 0, hmd->width, hmd->height);
|
|
}
|
|
else
|
|
{
|
|
float view[16];
|
|
bx::mtxLookAt(view, eye, at);
|
|
|
|
float proj[16];
|
|
bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
|
|
bgfx::setViewTransform(0, view, proj);
|
|
|
|
// Set view 0 default viewport.
|
|
bgfx::setViewRect(0, 0, 0, width, height);
|
|
}
|
|
|
|
float mtx[16];
|
|
bx::mtxRotateXY(mtx
|
|
, 0.0f
|
|
, time*0.37f
|
|
);
|
|
|
|
meshSubmit(mesh, 0, program, mtx);
|
|
|
|
// Advance to next frame. Rendering thread will be kicked to
|
|
// process submitted rendering primitives.
|
|
bgfx::frame();
|
|
}
|
|
|
|
meshUnload(mesh);
|
|
|
|
// Cleanup.
|
|
bgfx::destroyProgram(program);
|
|
|
|
bgfx::destroyUniform(u_time);
|
|
|
|
// Shutdown bgfx.
|
|
bgfx::shutdown();
|
|
|
|
return 0;
|
|
}
|