/* * Copyright 2011-2016 Branimir Karadzic. All rights reserved. * License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause */ #include "common.h" #include "bgfx_utils.h" 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[8] = { {-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_cubeIndices[36] = { 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, }; class ExampleInstancing : 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 ); // Create vertex stream declaration. PosColorVertex::init(); // Create static vertex buffer. m_vbh = bgfx::createVertexBuffer( bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) ) , PosColorVertex::ms_decl ); // Create static index buffer. m_ibh = bgfx::createIndexBuffer( bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) ) ); // Create program from shaders. m_program = loadProgram("vs_instancing", "fs_instancing"); m_timeOffset = bx::getHPCounter(); } int shutdown() BX_OVERRIDE { // Cleanup. bgfx::destroyIndexBuffer(m_ibh); bgfx::destroyVertexBuffer(m_vbh); bgfx::destroyProgram(m_program); // Shutdown bgfx. bgfx::shutdown(); return 0; } bool update() BX_OVERRIDE { if (!entry::processEvents(m_width, m_height, m_debug, m_reset) ) { // 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; float time = (float)( (now - m_timeOffset)/double(bx::getHPFrequency() ) ); // Use debug font to print information about this example. bgfx::dbgTextClear(); bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/05-instancing"); bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Geometry instancing."); bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs); // Get renderer capabilities info. const bgfx::Caps* caps = bgfx::getCaps(); // Check if instancing is supported. if (0 == (BGFX_CAPS_INSTANCING & caps->supported) ) { // When instancing is not supported by GPU, implement alternative // code path that doesn't use instancing. bool blink = uint32_t(time*3.0f)&1; bgfx::dbgTextPrintf(0, 5, blink ? 0x1f : 0x01, " Instancing is not supported by GPU. "); } else { 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); 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(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); } const uint16_t instanceStride = 80; const bgfx::InstanceDataBuffer* idb = bgfx::allocInstanceDataBuffer(121, instanceStride); if (NULL != idb) { uint8_t* data = idb->data; // Write instance data for 11x11 cubes. for (uint32_t yy = 0, numInstances = 0; yy < 11 && numInstances < idb->num; ++yy) { for (uint32_t xx = 0; xx < 11 && numInstances < idb->num; ++xx, ++numInstances) { float* mtx = (float*)data; 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; float* color = (float*)&data[64]; color[0] = sinf(time+float(xx)/11.0f)*0.5f+0.5f; color[1] = cosf(time+float(yy)/11.0f)*0.5f+0.5f; color[2] = sinf(time*3.0f)*0.5f+0.5f; color[3] = 1.0f; data += instanceStride; } } // Set vertex and index buffer. bgfx::setVertexBuffer(m_vbh); bgfx::setIndexBuffer(m_ibh); // Set instance data buffer. bgfx::setInstanceDataBuffer(idb); // Set render states. bgfx::setState(BGFX_STATE_DEFAULT); // 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; } uint32_t m_width; uint32_t m_height; uint32_t m_debug; uint32_t m_reset; bgfx::VertexBufferHandle m_vbh; bgfx::IndexBufferHandle m_ibh; bgfx::ProgramHandle m_program; int64_t m_timeOffset; }; ENTRY_IMPLEMENT_MAIN(ExampleInstancing);