mirror of
https://github.com/scratchfoundation/bgfx.git
synced 2024-11-28 10:35:43 -05:00
319 lines
8 KiB
C++
319 lines
8 KiB
C++
/*
|
|
* Copyright 2013 Milos Tosic. All rights reserved.
|
|
* License: http://www.opensource.org/licenses/BSD-2-Clause
|
|
*/
|
|
|
|
#include "common.h"
|
|
#include "bgfx_utils.h"
|
|
#include "imgui/imgui.h"
|
|
|
|
#include <bx/readerwriter.h>
|
|
|
|
struct KnightPos
|
|
{
|
|
int32_t m_x;
|
|
int32_t m_y;
|
|
};
|
|
|
|
static const KnightPos knightTour[8*4] =
|
|
{
|
|
{0,0}, {1,2}, {3,3}, {4,1}, {5,3}, {7,2}, {6,0}, {5,2},
|
|
{7,3}, {6,1}, {4,0}, {3,2}, {2,0}, {0,1}, {1,3}, {2,1},
|
|
{0,2}, {1,0}, {2,2}, {0,3}, {1,1}, {3,0}, {4,2}, {5,0},
|
|
{7,1}, {6,3}, {5,1}, {7,0}, {6,2}, {4,3}, {3,1}, {2,3},
|
|
};
|
|
|
|
class Lod : public entry::AppI
|
|
{
|
|
void init(int _argc, char** _argv) BX_OVERRIDE
|
|
{
|
|
Args args(_argc, _argv);
|
|
|
|
m_width = 1280;
|
|
m_height = 720;
|
|
m_debug = BGFX_DEBUG_TEXT;
|
|
m_reset = BGFX_RESET_VSYNC;
|
|
|
|
bgfx::init(args.m_type, args.m_pciId);
|
|
bgfx::reset(m_width, m_height, m_reset);
|
|
|
|
// Enable debug text.
|
|
bgfx::setDebug(m_debug);
|
|
|
|
// Set view 0 clear state.
|
|
bgfx::setViewClear(0
|
|
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
|
|
, 0x303030ff
|
|
, 1.0f
|
|
, 0
|
|
);
|
|
|
|
s_texColor = bgfx::createUniform("s_texColor", bgfx::UniformType::Int1);
|
|
s_texStipple = bgfx::createUniform("s_texStipple", bgfx::UniformType::Int1);
|
|
u_stipple = bgfx::createUniform("u_stipple", bgfx::UniformType::Vec4);
|
|
|
|
m_program = loadProgram("vs_tree", "fs_tree");
|
|
|
|
m_textureLeafs = loadTexture("leafs1.dds");
|
|
m_textureBark = loadTexture("bark1.dds");
|
|
|
|
const bgfx::Memory* stippleTex = bgfx::alloc(8*4);
|
|
memset(stippleTex->data, 0, stippleTex->size);
|
|
|
|
for (uint32_t ii = 0; ii < 32; ++ii)
|
|
{
|
|
stippleTex->data[knightTour[ii].m_y * 8 + knightTour[ii].m_x] = ii*4;
|
|
}
|
|
|
|
m_textureStipple = bgfx::createTexture2D(8, 4, 1
|
|
, bgfx::TextureFormat::R8
|
|
, BGFX_TEXTURE_MAG_POINT|BGFX_TEXTURE_MIN_POINT
|
|
, stippleTex
|
|
);
|
|
|
|
m_meshTop[0] = meshLoad("meshes/tree1b_lod0_1.bin");
|
|
m_meshTop[1] = meshLoad("meshes/tree1b_lod1_1.bin");
|
|
m_meshTop[2] = meshLoad("meshes/tree1b_lod2_1.bin");
|
|
|
|
m_meshTrunk[0] = meshLoad("meshes/tree1b_lod0_2.bin");
|
|
m_meshTrunk[1] = meshLoad("meshes/tree1b_lod1_2.bin");
|
|
m_meshTrunk[2] = meshLoad("meshes/tree1b_lod2_2.bin");
|
|
|
|
// Imgui.
|
|
imguiCreate();
|
|
|
|
m_scrollArea = 0;
|
|
m_transitions = true;
|
|
|
|
m_transitionFrame = 0;
|
|
m_currLod = 0;
|
|
m_targetLod = 0;
|
|
}
|
|
|
|
virtual int shutdown() BX_OVERRIDE
|
|
{
|
|
imguiDestroy();
|
|
|
|
for (uint32_t ii = 0; ii < BX_COUNTOF(m_meshTop); ++ii)
|
|
{
|
|
meshUnload(m_meshTop[ii]);
|
|
meshUnload(m_meshTrunk[ii]);
|
|
}
|
|
|
|
// Cleanup.
|
|
bgfx::destroyProgram(m_program);
|
|
|
|
bgfx::destroyUniform(s_texColor);
|
|
bgfx::destroyUniform(s_texStipple);
|
|
bgfx::destroyUniform(u_stipple);
|
|
|
|
bgfx::destroyTexture(m_textureStipple);
|
|
bgfx::destroyTexture(m_textureLeafs);
|
|
bgfx::destroyTexture(m_textureBark);
|
|
|
|
// Shutdown bgfx.
|
|
bgfx::shutdown();
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool update() BX_OVERRIDE
|
|
{
|
|
if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
|
|
{
|
|
imguiBeginFrame(m_mouseState.m_mx
|
|
, m_mouseState.m_my
|
|
, (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
|
|
| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
|
|
| (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
|
|
, m_mouseState.m_mz
|
|
, m_width
|
|
, m_height
|
|
);
|
|
|
|
imguiBeginScrollArea("Toggle transitions", m_width - m_width / 5 - 10, 10, m_width / 5, m_height / 6, &m_scrollArea);
|
|
imguiSeparatorLine();
|
|
|
|
if (imguiButton(m_transitions ? "ON" : "OFF") )
|
|
{
|
|
m_transitions = !m_transitions;
|
|
}
|
|
|
|
static float distance = 2.0f;
|
|
imguiSlider("Distance", distance, 2.0f, 6.0f, 0.01f);
|
|
|
|
imguiEndScrollArea();
|
|
imguiEndFrame();
|
|
|
|
// Set view 0 default viewport.
|
|
bgfx::setViewRect(0, 0, 0, m_width, m_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::touch(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;
|
|
|
|
// Use debug font to print information about this example.
|
|
bgfx::dbgTextClear();
|
|
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/12-lod");
|
|
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Mesh LOD transitions.");
|
|
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, -distance, -2.0f };
|
|
|
|
// 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 m_width/m_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(m_width)/float(m_height), 0.1f, 100.0f);
|
|
bgfx::setViewTransform(0, view, proj);
|
|
|
|
// Set view 0 default viewport.
|
|
bgfx::setViewRect(0, 0, 0, m_width, m_height);
|
|
}
|
|
|
|
float mtx[16];
|
|
bx::mtxScale(mtx, 0.1f, 0.1f, 0.1f);
|
|
|
|
float stipple[3];
|
|
float stippleInv[3];
|
|
|
|
const int currentLODframe = m_transitions ? 32-m_transitionFrame : 32;
|
|
const int mainLOD = m_transitions ? m_currLod : m_targetLod;
|
|
|
|
stipple[0] = 0.0f;
|
|
stipple[1] = -1.0f;
|
|
stipple[2] = (float(currentLODframe)*4.0f/255.0f) - (1.0f/255.0f);
|
|
|
|
stippleInv[0] = (float(31)*4.0f/255.0f);
|
|
stippleInv[1] = 1.0f;
|
|
stippleInv[2] = (float(m_transitionFrame)*4.0f/255.0f) - (1.0f/255.0f);
|
|
|
|
const uint64_t stateTransparent = 0
|
|
| BGFX_STATE_RGB_WRITE
|
|
| BGFX_STATE_ALPHA_WRITE
|
|
| BGFX_STATE_DEPTH_TEST_LESS
|
|
| BGFX_STATE_CULL_CCW
|
|
| BGFX_STATE_MSAA
|
|
| BGFX_STATE_BLEND_ALPHA
|
|
;
|
|
|
|
const uint64_t stateOpaque = BGFX_STATE_DEFAULT;
|
|
|
|
bgfx::setTexture(0, s_texColor, m_textureBark);
|
|
bgfx::setTexture(1, s_texStipple, m_textureStipple);
|
|
bgfx::setUniform(u_stipple, stipple);
|
|
meshSubmit(m_meshTrunk[mainLOD], 0, m_program, mtx, stateOpaque);
|
|
|
|
bgfx::setTexture(0, s_texColor, m_textureLeafs);
|
|
bgfx::setTexture(1, s_texStipple, m_textureStipple);
|
|
bgfx::setUniform(u_stipple, stipple);
|
|
meshSubmit(m_meshTop[mainLOD], 0, m_program, mtx, stateTransparent);
|
|
|
|
if (m_transitions
|
|
&& (m_transitionFrame != 0) )
|
|
{
|
|
bgfx::setTexture(0, s_texColor, m_textureBark);
|
|
bgfx::setTexture(1, s_texStipple, m_textureStipple);
|
|
bgfx::setUniform(u_stipple, stippleInv);
|
|
meshSubmit(m_meshTrunk[m_targetLod], 0, m_program, mtx, stateOpaque);
|
|
|
|
bgfx::setTexture(0, s_texColor, m_textureLeafs);
|
|
bgfx::setTexture(1, s_texStipple, m_textureStipple);
|
|
bgfx::setUniform(u_stipple, stippleInv);
|
|
meshSubmit(m_meshTop[m_targetLod], 0, m_program, mtx, stateTransparent);
|
|
}
|
|
|
|
int lod = 0;
|
|
if (eye[2] < -2.5f)
|
|
{
|
|
lod = 1;
|
|
}
|
|
|
|
if (eye[2] < -5.0f)
|
|
{
|
|
lod = 2;
|
|
}
|
|
|
|
if (m_targetLod != lod)
|
|
{
|
|
if (m_targetLod == m_currLod)
|
|
{
|
|
m_targetLod = lod;
|
|
}
|
|
}
|
|
|
|
if (m_currLod != m_targetLod)
|
|
{
|
|
m_transitionFrame++;
|
|
}
|
|
|
|
if (m_transitionFrame > 32)
|
|
{
|
|
m_currLod = m_targetLod;
|
|
m_transitionFrame = 0;
|
|
}
|
|
|
|
// Advance to next frame. Rendering thread will be kicked to
|
|
// process submitted rendering primitives.
|
|
bgfx::frame();
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
entry::MouseState m_mouseState;
|
|
uint32_t m_width;
|
|
uint32_t m_height;
|
|
uint32_t m_debug;
|
|
uint32_t m_reset;
|
|
|
|
Mesh* m_meshTop[3];
|
|
Mesh* m_meshTrunk[3];
|
|
|
|
bgfx::ProgramHandle m_program;
|
|
bgfx::UniformHandle s_texColor;
|
|
bgfx::UniformHandle s_texStipple;
|
|
bgfx::UniformHandle u_stipple;
|
|
|
|
bgfx::TextureHandle m_textureStipple;
|
|
bgfx::TextureHandle m_textureLeafs;
|
|
bgfx::TextureHandle m_textureBark;
|
|
|
|
int32_t m_scrollArea;
|
|
int32_t m_transitionFrame;
|
|
int32_t m_currLod;
|
|
int32_t m_targetLod;
|
|
bool m_transitions;
|
|
};
|
|
|
|
ENTRY_IMPLEMENT_MAIN(Lod);
|