mirror of
https://github.com/scratchfoundation/bgfx.git
synced 2024-11-25 00:58:30 -05:00
272 lines
6.7 KiB
C++
272 lines
6.7 KiB
C++
/*
|
|
* Copyright 2013 Milos Tosic. All rights reserved.
|
|
* License: http://www.opensource.org/licenses/BSD-2-Clause
|
|
*/
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#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;
|
|
};
|
|
|
|
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}
|
|
};
|
|
|
|
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_BIT|BGFX_CLEAR_DEPTH_BIT
|
|
, 0x303030ff
|
|
, 1.0f
|
|
, 0
|
|
);
|
|
|
|
bgfx::UniformHandle u_texColor = bgfx::createUniform("u_texColor", bgfx::UniformType::Uniform1iv);
|
|
bgfx::UniformHandle u_stipple = bgfx::createUniform("u_stipple", bgfx::UniformType::Uniform3fv);
|
|
bgfx::UniformHandle u_texStipple = bgfx::createUniform("u_texStipple", bgfx::UniformType::Uniform1iv);
|
|
|
|
bgfx::ProgramHandle program = loadProgram("vs_tree", "fs_tree");
|
|
|
|
bgfx::TextureHandle textureLeafs = loadTexture("leafs1.dds");
|
|
bgfx::TextureHandle textureBark = loadTexture("bark1.dds");
|
|
|
|
bgfx::TextureHandle textureStipple;
|
|
|
|
const bgfx::Memory* stipple = bgfx::alloc(8*4);
|
|
memset(stipple->data, 0, stipple->size);
|
|
|
|
for (uint32_t ii = 0; ii < 32; ++ii)
|
|
{
|
|
stipple->data[knightTour[ii].m_y * 8 + knightTour[ii].m_x] = ii*4;
|
|
}
|
|
|
|
textureStipple = bgfx::createTexture2D(8, 4, 1, bgfx::TextureFormat::R8, BGFX_TEXTURE_MAG_POINT|BGFX_TEXTURE_MIN_POINT, stipple);
|
|
|
|
Mesh* meshTop[3] =
|
|
{
|
|
meshLoad("meshes/tree1b_lod0_1.bin"),
|
|
meshLoad("meshes/tree1b_lod1_1.bin"),
|
|
meshLoad("meshes/tree1b_lod2_1.bin"),
|
|
};
|
|
|
|
Mesh* meshTrunk[3] =
|
|
{
|
|
meshLoad("meshes/tree1b_lod0_2.bin"),
|
|
meshLoad("meshes/tree1b_lod1_2.bin"),
|
|
meshLoad("meshes/tree1b_lod2_2.bin"),
|
|
};
|
|
|
|
// Imgui.
|
|
void* data = load("font/droidsans.ttf");
|
|
imguiCreate(data);
|
|
free(data);
|
|
|
|
const uint64_t stateCommon = 0
|
|
| BGFX_STATE_RGB_WRITE
|
|
| BGFX_STATE_ALPHA_WRITE
|
|
| BGFX_STATE_DEPTH_TEST_LESS
|
|
| BGFX_STATE_CULL_CCW
|
|
| BGFX_STATE_MSAA
|
|
;
|
|
|
|
const uint64_t stateTransparent = stateCommon
|
|
| BGFX_STATE_BLEND_ALPHA
|
|
;
|
|
|
|
const uint64_t stateOpaque = stateCommon
|
|
| BGFX_STATE_DEPTH_WRITE
|
|
;
|
|
|
|
int32_t scrollArea = 0;
|
|
|
|
bool transitions = true;
|
|
int transitionFrame = 0;
|
|
int currLOD = 0;
|
|
int targetLOD = 0;
|
|
|
|
float at[3] = { 0.0f, 1.0f, 0.0f };
|
|
float eye[3] = { 0.0f, 1.0f, -2.0f };
|
|
|
|
entry::MouseState mouseState;
|
|
while (!entry::processEvents(width, height, debug, reset, &mouseState) )
|
|
{
|
|
imguiBeginFrame(mouseState.m_mx
|
|
, mouseState.m_my
|
|
, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
|
|
| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
|
|
, 0
|
|
, width
|
|
, height
|
|
);
|
|
|
|
imguiBeginScrollArea("Toggle transitions", width - width / 5 - 10, 10, width / 5, height / 6, &scrollArea);
|
|
imguiSeparatorLine();
|
|
|
|
if (imguiButton(transitions ? "ON" : "OFF") )
|
|
{
|
|
transitions = !transitions;
|
|
}
|
|
|
|
static float distance = 2.0f;
|
|
imguiSlider("Distance", distance, 2.0f, 6.0f, .01f);
|
|
|
|
imguiEndScrollArea();
|
|
imguiEndFrame();
|
|
|
|
// 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;
|
|
|
|
// 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);
|
|
bgfx::dbgTextPrintf(0, 4, transitions ? 0x2f : 0x1f, transitions ? "Transitions on" : "Transitions off");
|
|
|
|
eye[2] = -distance;
|
|
|
|
float view[16];
|
|
float proj[16];
|
|
bx::mtxLookAt(view, eye, at);
|
|
bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
|
|
|
|
// Set view and projection matrix for view 0.
|
|
bgfx::setViewTransform(0, view, proj);
|
|
|
|
float mtx[16];
|
|
bx::mtxScale(mtx, 0.1f, 0.1f, 0.1f);
|
|
|
|
float stipple[3];
|
|
float stippleInv[3];
|
|
|
|
const int currentLODframe = transitions ? 32-transitionFrame : 32;
|
|
const int mainLOD = transitions ? currLOD : 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(transitionFrame)*4.0f/255.0f) - (1.0f/255.0f);
|
|
|
|
bgfx::setTexture(0, u_texColor, textureBark);
|
|
bgfx::setTexture(1, u_texStipple, textureStipple);
|
|
bgfx::setUniform(u_stipple, stipple);
|
|
meshSubmit(meshTrunk[mainLOD], 0, program, mtx, stateOpaque);
|
|
|
|
bgfx::setTexture(0, u_texColor, textureLeafs);
|
|
bgfx::setTexture(1, u_texStipple, textureStipple);
|
|
bgfx::setUniform(u_stipple, stipple);
|
|
meshSubmit(meshTop[mainLOD], 0, program, mtx, stateTransparent);
|
|
|
|
if (transitions
|
|
&& (transitionFrame != 0) )
|
|
{
|
|
bgfx::setTexture(0, u_texColor, textureBark);
|
|
bgfx::setTexture(1, u_texStipple, textureStipple);
|
|
bgfx::setUniform(u_stipple, stippleInv);
|
|
meshSubmit(meshTrunk[targetLOD], 0, program, mtx, stateOpaque);
|
|
|
|
bgfx::setTexture(0, u_texColor, textureLeafs);
|
|
bgfx::setTexture(1, u_texStipple, textureStipple);
|
|
bgfx::setUniform(u_stipple, stippleInv);
|
|
meshSubmit(meshTop[targetLOD], 0, program, mtx, stateTransparent);
|
|
}
|
|
|
|
int lod = 0;
|
|
if (eye[2] < -2.5f)
|
|
{
|
|
lod = 1;
|
|
}
|
|
|
|
if (eye[2] < -5.0f)
|
|
{
|
|
lod = 2;
|
|
}
|
|
|
|
if (targetLOD!=lod)
|
|
{
|
|
if (targetLOD==currLOD)
|
|
{
|
|
targetLOD = lod;
|
|
}
|
|
}
|
|
|
|
if (currLOD != targetLOD)
|
|
{
|
|
transitionFrame++;
|
|
}
|
|
|
|
if (transitionFrame>32)
|
|
{
|
|
currLOD = targetLOD;
|
|
transitionFrame = 0;
|
|
}
|
|
|
|
// Advance to next frame. Rendering thread will be kicked to
|
|
// process submitted rendering primitives.
|
|
bgfx::frame();
|
|
}
|
|
|
|
imguiDestroy();
|
|
|
|
for (uint32_t ii = 0; ii < 3; ++ii)
|
|
{
|
|
meshUnload(meshTop[ii]);
|
|
meshUnload(meshTrunk[ii]);
|
|
}
|
|
|
|
// Cleanup.
|
|
bgfx::destroyProgram(program);
|
|
|
|
bgfx::destroyUniform(u_texColor);
|
|
bgfx::destroyUniform(u_stipple);
|
|
bgfx::destroyUniform(u_texStipple);
|
|
|
|
bgfx::destroyTexture(textureStipple);
|
|
bgfx::destroyTexture(textureLeafs);
|
|
bgfx::destroyTexture(textureBark);
|
|
|
|
// Shutdown bgfx.
|
|
bgfx::shutdown();
|
|
|
|
return 0;
|
|
}
|