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author Miodrag Milanovic <mmicko@gmail.com>2015-02-01 10:14:17 +0100
committer Miodrag Milanovic <mmicko@gmail.com>2015-02-01 10:14:17 +0100
commitb3303c3a32b94b61f82e739d8d494752047f11c1 (patch)
tree1383c753eaebdfa039f1768f55c96fe800ce020f /3rdparty/bgfx/examples/05-instancing/instancing.cpp
parent09b6ec9869349cf9befd8c3589f1dccb32bacd1a (diff)
Added BGFX latest code to 3rdparty (nw)
Diffstat (limited to '3rdparty/bgfx/examples/05-instancing/instancing.cpp')
-rw-r--r--3rdparty/bgfx/examples/05-instancing/instancing.cpp226
1 files changed, 226 insertions, 0 deletions
diff --git a/3rdparty/bgfx/examples/05-instancing/instancing.cpp b/3rdparty/bgfx/examples/05-instancing/instancing.cpp
new file mode 100644
index 00000000000..e17f7fb8c16
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+++ b/3rdparty/bgfx/examples/05-instancing/instancing.cpp
@@ -0,0 +1,226 @@
+/*
+ * Copyright 2011-2015 Branimir Karadzic. All rights reserved.
+ * License: http://www.opensource.org/licenses/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,
+};
+
+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
+ );
+
+ // Get renderer capabilities info.
+ const bgfx::Caps* caps = bgfx::getCaps();
+
+ // Create vertex stream declaration.
+ PosColorVertex::init();
+
+ const bgfx::Memory* mem;
+
+ // Create static vertex buffer.
+ mem = bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) );
+ bgfx::VertexBufferHandle vbh = bgfx::createVertexBuffer(mem, PosColorVertex::ms_decl);
+
+ // Create static index buffer.
+ mem = bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) );
+ bgfx::IndexBufferHandle ibh = bgfx::createIndexBuffer(mem);
+
+ // Create program from shaders.
+ bgfx::ProgramHandle program = loadProgram("vs_instancing", "fs_instancing");
+
+ 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)( (now - 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);
+
+ // 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)
+ {
+ 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);
+ }
+
+ 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; yy < 11; ++yy)
+ {
+ for (uint32_t xx = 0; xx < 11; ++xx)
+ {
+ 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] = sin(time+float(xx)/11.0f)*0.5f+0.5f;
+ color[1] = cos(time+float(yy)/11.0f)*0.5f+0.5f;
+ color[2] = sin(time*3.0f)*0.5f+0.5f;
+ color[3] = 1.0f;
+
+ data += instanceStride;
+ }
+ }
+
+ // Set vertex and fragment shaders.
+ bgfx::setProgram(program);
+
+ // Set vertex and index buffer.
+ bgfx::setVertexBuffer(vbh);
+ bgfx::setIndexBuffer(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);
+ }
+ }
+
+ // Advance to next frame. Rendering thread will be kicked to
+ // process submitted rendering primitives.
+ bgfx::frame();
+ }
+
+ // Cleanup.
+ bgfx::destroyIndexBuffer(ibh);
+ bgfx::destroyVertexBuffer(vbh);
+ bgfx::destroyProgram(program);
+
+ // Shutdown bgfx.
+ bgfx::shutdown();
+
+ return 0;
+}