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Diffstat (limited to '3rdparty/bgfx/examples/35-dynamic/dynamic.cpp')
-rw-r--r-- | 3rdparty/bgfx/examples/35-dynamic/dynamic.cpp | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/3rdparty/bgfx/examples/35-dynamic/dynamic.cpp b/3rdparty/bgfx/examples/35-dynamic/dynamic.cpp new file mode 100644 index 00000000000..1823721aafc --- /dev/null +++ b/3rdparty/bgfx/examples/35-dynamic/dynamic.cpp @@ -0,0 +1,294 @@ +/* + * Copyright 2011-2017 Branimir Karadzic. All rights reserved. + * License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause + */ + +#include "common.h" +#include "bgfx_utils.h" +#include "imgui/imgui.h" + +#include <bx/rng.h> + +namespace +{ + +const uint32_t kDimWidth = 11; +const uint32_t kDimHeight = 11; + +struct PosColorVertex +{ + float m_x; + float m_y; + float m_z; + uint32_t m_abgr; + + static void init() + { + ms_decl + .begin() + .add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float) + .add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true) + .end(); + }; + + static bgfx::VertexDecl ms_decl; +}; + +bgfx::VertexDecl PosColorVertex::ms_decl; + +static PosColorVertex s_cubeVertices[] = +{ + {-1.0f, 1.0f, 1.0f, 0xff000000 }, + { 1.0f, 1.0f, 1.0f, 0xff0000ff }, + {-1.0f, -1.0f, 1.0f, 0xff00ff00 }, + { 1.0f, -1.0f, 1.0f, 0xff00ffff }, + {-1.0f, 1.0f, -1.0f, 0xffff0000 }, + { 1.0f, 1.0f, -1.0f, 0xffff00ff }, + {-1.0f, -1.0f, -1.0f, 0xffffff00 }, + { 1.0f, -1.0f, -1.0f, 0xffffffff }, +}; + +static const uint16_t s_cubeTriList[] = +{ + 0, 1, 2, // 0 + 1, 3, 2, + 4, 6, 5, // 2 + 5, 6, 7, + 0, 2, 4, // 4 + 4, 2, 6, + 1, 5, 3, // 6 + 5, 7, 3, + 0, 4, 1, // 8 + 4, 5, 1, + 2, 3, 6, // 10 + 6, 3, 7, +}; + +static const uint16_t s_cubeTriStrip[] = +{ + 0, 1, 2, + 3, + 7, + 1, + 5, + 0, + 4, + 2, + 6, + 7, + 4, + 5, +}; + +class ExampleDynamic : public entry::AppI +{ +public: + ExampleDynamic(const char* _name, const char* _description) + : entry::AppI(_name, _description) + { + } + + void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override + { + BX_UNUSED(s_cubeTriList, s_cubeTriStrip); + + Args args(_argc, _argv); + + m_width = _width; + m_height = _height; + m_debug = BGFX_DEBUG_NONE; + 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 + ); + + // Create vertex stream declaration. + PosColorVertex::init(); + + // Create static vertex buffer. + for (uint32_t yy = 0; yy < kDimHeight; ++yy) + { + for (uint32_t xx = 0; xx < kDimWidth; ++xx) + { + m_vbh[yy*kDimWidth+xx] = bgfx::createDynamicVertexBuffer( + // Static data can be passed with bgfx::makeRef + bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) ) + , PosColorVertex::ms_decl + ); + } + } + + // Create static index buffer. + m_ibh = bgfx::createDynamicIndexBuffer( + // Static data can be passed with bgfx::makeRef + bgfx::makeRef(s_cubeTriStrip, sizeof(s_cubeTriStrip) ) + ); + + // Create program from shaders. + m_program = loadProgram("vs_cubes", "fs_cubes"); + + m_timeOffset = bx::getHPCounter(); + + imguiCreate(); + } + + virtual int shutdown() override + { + imguiDestroy(); + + // Cleanup. + bgfx::destroy(m_ibh); + for (uint32_t yy = 0; yy < kDimHeight; ++yy) + { + for (uint32_t xx = 0; xx < kDimWidth; ++xx) + { + bgfx::destroy(m_vbh[yy*kDimWidth+xx]); + } + } + + bgfx::destroy(m_program); + + // Shutdown bgfx. + bgfx::shutdown(); + + return 0; + } + + bool update() 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 + , uint16_t(m_width) + , uint16_t(m_height) + ); + + showExampleDialog(this); + + imguiEndFrame(); + + float time = (float)( (bx::getHPCounter()-m_timeOffset)/double(bx::getHPFrequency() ) ); + + float at[3] = { 0.0f, 0.0f, 0.0f }; + float eye[3] = { 0.0f, 0.0f, -35.0f }; + + // 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); + bgfx::setViewTransform(0, view, hmd->eye[0].projection, BGFX_VIEW_STEREO, hmd->eye[1].projection); + + // 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(m_width)/float(m_height), 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth); + bgfx::setViewTransform(0, view, proj); + + // Set view 0 default viewport. + bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(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); + + { + float angle = bx::frnd(&m_mwc); + float mtx[16]; + bx::mtxRotateZ(mtx, angle); + + const bgfx::Memory* mem = bgfx::copy(s_cubeVertices, sizeof(s_cubeVertices) ); + PosColorVertex* vertex = (PosColorVertex*)mem->data; + const uint32_t abgr = m_mwc.gen(); + for (uint32_t ii = 0; ii < BX_COUNTOF(s_cubeVertices); ++ii) + { + bx::vec3MulMtx(&vertex[ii].m_x, &s_cubeVertices[ii].m_x, mtx); + vertex[ii].m_abgr = abgr; + } + + uint32_t idx = m_mwc.gen() % (kDimWidth*kDimHeight); + bgfx::updateDynamicVertexBuffer(m_vbh[idx], 0, mem); + } + + // Submit 11x11 cubes. + for (uint32_t yy = 0; yy < kDimHeight; ++yy) + { + for (uint32_t xx = 0; xx < kDimWidth; ++xx) + { + float mtx[16]; + bx::mtxRotateXY(mtx, time + xx*0.21f, time + yy*0.37f); + mtx[12] = -15.0f + float(xx)*3.0f; + mtx[13] = -15.0f + float(yy)*3.0f; + mtx[14] = 0.0f; + + // Set model matrix for rendering. + bgfx::setTransform(mtx); + + // Set vertex and index buffer. + bgfx::setVertexBuffer(0, m_vbh[yy*kDimWidth+xx]); + bgfx::setIndexBuffer(m_ibh); + + // Set render states. + bgfx::setState(0 + | BGFX_STATE_DEFAULT + | BGFX_STATE_PT_TRISTRIP + ); + + // Submit primitive for rendering to view 0. + bgfx::submit(0, m_program); + } + } + + // Advance to next frame. Rendering thread will be kicked to + // process submitted rendering primitives. + bgfx::frame(); + + return true; + } + + return false; + } + + entry::MouseState m_mouseState; + + bx::RngMwc m_mwc; + uint32_t m_width; + uint32_t m_height; + uint32_t m_debug; + uint32_t m_reset; + bgfx::DynamicVertexBufferHandle m_vbh[kDimWidth*kDimHeight]; + bgfx::DynamicIndexBufferHandle m_ibh; + bgfx::ProgramHandle m_program; + int64_t m_timeOffset; +}; + +} // namespace + +ENTRY_IMPLEMENT_MAIN(ExampleDynamic, "35-dynamic", "Dynamic buffers update."); |