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OpenSubdiv/examples/glEvalLimit/glEvalLimit.cpp

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//
// Copyright 2013 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
// names, trademarks, service marks, or product names of the Licensor
// and its affiliates, except as required to comply with Section 4(c) of
// the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#if defined(__APPLE__)
#if defined(OSD_USES_GLEW)
#include <GL/glew.h>
#else
#include <OpenGL/gl3.h>
#endif
#define GLFW_INCLUDE_GL3
#define GLFW_NO_GLU
#else
#include <stdlib.h>
#include <GL/glew.h>
#if defined(WIN32)
#include <GL/wglew.h>
#endif
#endif
#include <GLFW/glfw3.h>
GLFWwindow* g_window=0;
GLFWmonitor* g_primary=0;
#include <osd/cpuComputeContext.h>
#include <osd/cpuComputeController.h>
#include <osd/cpuEvalLimitContext.h>
#include <osd/cpuEvalLimitController.h>
#include <osd/cpuVertexBuffer.h>
#include <osd/cpuGLVertexBuffer.h>
#include <osd/error.h>
#include <osd/drawContext.h>
#include <osd/mesh.h>
#include <osd/vertex.h>
#include <common/vtr_utils.h>
#include "../common/stopwatch.h"
#include "../common/simple_math.h"
#include "../common/gl_hud.h"
#include "init_shapes.h"
#include "particles.h"
#include <cfloat>
#include <vector>
#include <iostream>
#include <fstream>
#include <sstream>
#include <stdlib.h>
#ifdef OPENSUBDIV_HAS_OPENMP
#include <omp.h>
#endif
using namespace OpenSubdiv;
//------------------------------------------------------------------------------
std::vector<float> g_orgPositions,
g_positions,
g_varyingColors;
int g_currentShape = 0,
g_level = 3,
g_numElements = 3;
std::vector<int> g_coarseEdges;
std::vector<float> g_coarseEdgeSharpness;
std::vector<float> g_coarseVertexSharpness;
enum DrawMode { kRANDOM=0,
kUV=1,
kVARYING=2,
kFACEVARYING=3 };
int g_running = 1,
g_width = 1024,
g_height = 1024,
g_fullscreen = 0,
g_drawCageEdges = 1,
g_drawCageVertices = 1,
g_drawMode = kVARYING,
g_prev_x = 0,
g_prev_y = 0,
g_mbutton[3] = {0, 0, 0},
g_frame=0,
g_freeze=0,
g_repeatCount;
float g_rotate[2] = {0, 0},
g_dolly = 5,
g_pan[2] = {0, 0},
g_center[3] = {0, 0, 0},
g_size = 0,
g_moveScale = 0.0f;
GLuint g_transformUB = 0,
g_transformBinding = 0;
struct Transform {
float ModelViewMatrix[16];
float ProjectionMatrix[16];
float ModelViewProjectionMatrix[16];
} g_transformData;
// performance
float g_evalTime = 0;
float g_computeTime = 0;
Stopwatch g_fpsTimer;
//------------------------------------------------------------------------------
int g_nparticles=0,
g_nsamples=101,
g_nsamplesFound=0;
bool g_randomStart=true;
GLuint g_cageEdgeVAO = 0,
g_cageEdgeVBO = 0,
g_cageVertexVAO = 0,
g_cageVertexVBO = 0,
g_samplesVAO=0;
GLhud g_hud;
//------------------------------------------------------------------------------
static void
createRandomColors(int nverts, int stride, float * colors) {
// large Pell prime number
srand( static_cast<int>(2147483647) );
for (int i=0; i<nverts; ++i) {
colors[i*stride+0] = (float)rand()/(float)RAND_MAX;
colors[i*stride+1] = (float)rand()/(float)RAND_MAX;
colors[i*stride+2] = (float)rand()/(float)RAND_MAX;
}
}
//------------------------------------------------------------------------------
static void
createCoarseMesh(OpenSubdiv::Far::TopologyRefiner const & refiner) {
typedef OpenSubdiv::Far::IndexArray IndexArray;
// save coarse topology (used for coarse mesh drawing)
int nedges = refiner.GetNumEdges(0),
nverts = refiner.GetNumVertices(0);
g_coarseEdges.resize(nedges*2);
g_coarseEdgeSharpness.resize(nedges);
g_coarseVertexSharpness.resize(nverts);
for(int i=0; i<nedges; ++i) {
IndexArray verts = refiner.GetEdgeVertices(0, i);
g_coarseEdges[i*2 ]=verts[0];
g_coarseEdges[i*2+1]=verts[1];
g_coarseEdgeSharpness[i]=refiner.GetEdgeSharpness(0, i);
}
for(int i=0; i<nverts; ++i) {
g_coarseVertexSharpness[i]=refiner.GetVertexSharpness(0, i);
}
// assign a randomly generated color for each vertex ofthe mesh
g_varyingColors.resize(nverts*3);
createRandomColors(nverts, 3, &g_varyingColors[0]);
}
//------------------------------------------------------------------------------
Far::TopologyRefiner * g_topologyRefiner = 0;
Osd::CpuVertexBuffer * g_vertexData = 0,
* g_varyingData = 0;
Osd::CpuComputeContext * g_computeCtx = 0;
Osd::CpuComputeController g_computeCtrl;
Far::KernelBatchVector g_kernelBatches;
Osd::CpuEvalLimitContext * g_evalCtx = 0;
Osd::CpuEvalLimitController g_evalCtrl;
Osd::VertexBufferDescriptor g_idesc( /*offset*/ 0, /*legnth*/ 3, /*stride*/ 3 ),
g_odesc( /*offset*/ 0, /*legnth*/ 3, /*stride*/ 6 ),
g_vdesc( /*offset*/ 3, /*legnth*/ 3, /*stride*/ 6 ),
g_fvidesc( /*offset*/ 0, /*legnth*/ 2, /*stride*/ 2 ),
g_fvodesc( /*offset*/ 3, /*legnth*/ 2, /*stride*/ 6 );
Osd::CpuGLVertexBuffer * g_Q=0,
* g_dQs=0,
* g_dQt=0;
STParticles * g_particles=0;
//------------------------------------------------------------------------------
static void
updateGeom() {
int nverts = (int)g_orgPositions.size() / 3;
const float *p = &g_orgPositions[0];
float r = sin(g_frame*0.001f) * g_moveScale;
for (int i = 0; i < nverts; ++i) {
//float move = 0.05f*cosf(p[0]*20+g_frame*0.01f);
float ct = cos(p[2] * r);
float st = sin(p[2] * r);
g_positions[i*3+0] = p[0]*ct + p[1]*st;
g_positions[i*3+1] = -p[0]*st + p[1]*ct;
g_positions[i*3+2] = p[2];
p+=3;
}
// Run Compute pass to pose the control vertices ---------------------------
Stopwatch s;
s.Start();
g_vertexData->UpdateData( &g_positions[0], 0, nverts);
g_computeCtrl.Compute(g_computeCtx, g_kernelBatches, g_vertexData, g_varyingData);
s.Stop();
g_computeTime = float(s.GetElapsed() * 1000.0f);
// Run Eval pass to get the samples locations ------------------------------
s.Start();
// The varying data ends-up interleaved in the same g_Q output buffer because
// g_Q has a stride of 6 and g_vdesc sets the offset to 3, while g_odesc sets
// the offset to 0
switch (g_drawMode) {
case kVARYING : g_evalCtrl.BindVaryingBuffers( g_idesc, g_varyingData, g_vdesc, g_Q ); break;
case kFACEVARYING : //g_evalCtrl.BindFacevaryingBuffers( g_fvidesc, g_fvodesc, g_Q ); break;
case kRANDOM :
case kUV :
default : g_evalCtrl.Unbind(); break;
}
// Bind/Unbind of the vertex buffers to the context needs to happen
// outside of the parallel loop
g_evalCtrl.BindVertexBuffers( g_idesc, g_vertexData, g_odesc, g_Q, g_dQs, g_dQt );
// Apply 'dynamics' update
assert(g_particles);
g_particles->Update(g_evalTime); // XXXX g_evalTime is not really elapsed time...
// Evaluate the positions of the samples on the limit surface
g_nsamplesFound=0;
#define USE_OPENMP
#if defined(OPENSUBDIV_HAS_OPENMP) and defined(USE_OPENMP)
#pragma omp parallel for
#endif
for (int i=0; i<g_nparticles; ++i) {
Osd::LimitLocation & coord = g_particles->GetPositions()[i];
int n = g_evalCtrl.EvalLimitSample( coord, g_evalCtx, i );
if (n) {
// point colors
switch (g_drawMode) {
case kUV : { float * color = g_Q->BindCpuBuffer() + i*g_Q->GetNumElements() + 3;
color[0] = coord.s;
color[1] = 0.0f;
color[2] = coord.t; } break;
case kRANDOM : // no update needed
case kVARYING :
case kFACEVARYING : break;
default : break;
}
#if defined(OPENSUBDIV_HAS_OPENMP) and defined(USE_OPENMP)
#pragma omp atomic
#endif
g_nsamplesFound += n;
} else {
// "hide" unfound samples (hole tags...) as a black dot at the origin
float * sample = g_Q->BindCpuBuffer() + i*g_Q->GetNumElements();
memset(sample, 0, g_Q->GetNumElements() * sizeof(float));
}
}
g_evalCtrl.Unbind();
g_Q->BindVBO();
s.Stop();
g_evalTime = float(s.GetElapsed());
}
//------------------------------------------------------------------------------
static void
createOsdMesh(ShapeDesc const & shapeDesc, int level) {
Shape * shape = Shape::parseObj(shapeDesc.data.c_str(), shapeDesc.scheme);
// create Vtr mesh (topology)
OpenSubdiv::Sdc::Type sdctype = GetSdcType(*shape);
OpenSubdiv::Sdc::Options sdcoptions = GetSdcOptions(*shape);
delete g_topologyRefiner;
OpenSubdiv::Far::TopologyRefiner * g_topologyRefiner =
OpenSubdiv::Far::TopologyRefinerFactory<Shape>::Create(sdctype, sdcoptions, *shape);
g_orgPositions=shape->verts;
g_positions.resize(g_orgPositions.size(), 0.0f);
delete shape;
float speed = g_particles ? g_particles->GetSpeed() : 0.2f;
// Create the 'uv particles' manager - this class manages the limit
// location samples (ptex face index, (s,t) and updates them between frames.
// Note: the number of limit locations can be entirely arbitrary
delete g_particles;
g_particles = new STParticles(*g_topologyRefiner, g_nsamples, g_randomStart);
g_nparticles = g_particles->GetNumParticles();
g_particles->SetSpeed(speed);
createCoarseMesh(*g_topologyRefiner);
int nverts=0;
{
// Apply feature adaptive refinement to the mesh so that we can use the
// limit evaluation API features.
g_topologyRefiner->RefineAdaptive(level);
nverts = g_topologyRefiner->GetNumVerticesTotal();
// Generate stencil tables to update the bi-cubic patches control
// vertices after they have been re-posed (both for vertex & varying
// interpolation)
Far::StencilTablesFactory::Options options;
options.generateOffsets=true;
options.generateIntermediateLevels=true;
Far::StencilTables const * vertexStencils =
Far::StencilTablesFactory::Create(*g_topologyRefiner, options);
options.interpolationMode = Far::StencilTablesFactory::INTERPOLATE_VARYING;
Far::StencilTables const * varyingStencils =
Far::StencilTablesFactory::Create(*g_topologyRefiner, options);
g_kernelBatches.clear();
g_kernelBatches.push_back(Far::StencilTablesFactory::Create(*vertexStencils));
// Create an Osd Compute context, used to "pose" the vertices with
// the stencils tables
delete g_computeCtx;
g_computeCtx = Osd::CpuComputeContext::Create(vertexStencils, varyingStencils);
// Generate bi-cubic patch tables for the limit surface
Far::PatchTables const * patchTables =
Far::PatchTablesFactory::Create(*g_topologyRefiner);
// Create a limit Eval context with the patch tables
delete g_evalCtx;
g_evalCtx = Osd::CpuEvalLimitContext::Create(*patchTables);
}
{ // Create vertex primvar buffer for the CVs
delete g_vertexData;
g_vertexData = Osd::CpuVertexBuffer::Create(3, nverts);
// Create varying primvar buffer for the CVs with random colors.
// These are immediately interpolated (once) and saved for display.
delete g_varyingData; g_varyingData = 0;
if (g_drawMode==kVARYING) {
g_varyingData = Osd::CpuVertexBuffer::Create(3, nverts);
g_varyingData->UpdateData( &g_varyingColors[0], 0, nverts);
}
// Create output buffers for the limit samples (position & tangents)
delete g_Q;
g_Q = Osd::CpuGLVertexBuffer::Create(6, g_nparticles);
memset( g_Q->BindCpuBuffer(), 0, g_nparticles*6*sizeof(float));
if (g_drawMode==kRANDOM) {
createRandomColors(g_nparticles, 6, g_Q->BindCpuBuffer()+3);
}
delete g_dQs;
g_dQs = Osd::CpuGLVertexBuffer::Create(6,g_nparticles);
memset( g_dQs->BindCpuBuffer(), 0, g_nparticles*6*sizeof(float));
delete g_dQt;
g_dQt = Osd::CpuGLVertexBuffer::Create(6,g_nparticles);
memset( g_dQt->BindCpuBuffer(), 0, g_nparticles*6*sizeof(float));
}
updateGeom();
// Bind g_Q as a GL_POINTS VBO
glBindVertexArray(g_samplesVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_Q->BindVBO());
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, 0);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, (float*)12);
glBindVertexArray(0);
}
//------------------------------------------------------------------------------
struct Program
{
GLuint program;
GLuint uniformModelViewProjectionMatrix;
GLuint attrPosition;
GLuint attrColor;
} g_defaultProgram;
//------------------------------------------------------------------------------
static void
checkGLErrors(std::string const & where = "")
{
GLuint err;
while ((err = glGetError()) != GL_NO_ERROR) {
std::cerr << "GL error: "
<< (where.empty() ? "" : where + " ")
<< err << "\n";
}
}
//------------------------------------------------------------------------------
static GLuint
compileShader(GLenum shaderType, const char *source)
{
GLuint shader = glCreateShader(shaderType);
glShaderSource(shader, 1, &source, NULL);
glCompileShader(shader);
checkGLErrors("compileShader");
return shader;
}
//------------------------------------------------------------------------------
static bool
linkDefaultProgram()
{
#if defined(GL_ARB_tessellation_shader) || defined(GL_VERSION_4_0)
#define GLSL_VERSION_DEFINE "#version 400\n"
#else
#define GLSL_VERSION_DEFINE "#version 150\n"
#endif
static const char *vsSrc =
GLSL_VERSION_DEFINE
"in vec3 position;\n"
"in vec3 color;\n"
"out vec4 fragColor;\n"
"uniform mat4 ModelViewProjectionMatrix;\n"
"void main() {\n"
" fragColor = vec4(color, 1);\n"
" gl_Position = ModelViewProjectionMatrix * "
" vec4(position, 1);\n"
"}\n";
static const char *fsSrc =
GLSL_VERSION_DEFINE
"in vec4 fragColor;\n"
"out vec4 color;\n"
"void main() {\n"
" color = fragColor;\n"
"}\n";
GLuint program = glCreateProgram();
GLuint vertexShader = compileShader(GL_VERTEX_SHADER, vsSrc);
GLuint fragmentShader = compileShader(GL_FRAGMENT_SHADER, fsSrc);
glAttachShader(program, vertexShader);
glAttachShader(program, fragmentShader);
glBindAttribLocation(program, 0, "position");
glBindAttribLocation(program, 1, "color");
glBindFragDataLocation(program, 0, "color");
glLinkProgram(program);
GLint status;
glGetProgramiv(program, GL_LINK_STATUS, &status);
if (status == GL_FALSE) {
GLint infoLogLength;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &infoLogLength);
char *infoLog = new char[infoLogLength];
glGetProgramInfoLog(program, infoLogLength, NULL, infoLog);
printf("%s\n", infoLog);
delete[] infoLog;
exit(1);
}
g_defaultProgram.program = program;
g_defaultProgram.uniformModelViewProjectionMatrix =
glGetUniformLocation(program, "ModelViewProjectionMatrix");
g_defaultProgram.attrPosition = glGetAttribLocation(program, "position");
g_defaultProgram.attrColor = glGetAttribLocation(program, "color");
return true;
}
//------------------------------------------------------------------------------
static inline void
setSharpnessColor(float s, float *r, float *g, float *b)
{
// 0.0 2.0 4.0
// green --- yellow --- red
*r = std::min(1.0f, s * 0.5f);
*g = std::min(1.0f, 2.0f - s*0.5f);
*b = 0;
}
//------------------------------------------------------------------------------
static void
drawCageEdges() {
glUseProgram(g_defaultProgram.program);
glUniformMatrix4fv(g_defaultProgram.uniformModelViewProjectionMatrix,
1, GL_FALSE, g_transformData.ModelViewProjectionMatrix);
std::vector<float> vbo;
vbo.reserve(g_coarseEdges.size() * 6);
float r, g, b;
for (int i = 0; i < (int)g_coarseEdges.size(); i+=2) {
setSharpnessColor(g_coarseEdgeSharpness[i/2], &r, &g, &b);
for (int j = 0; j < 2; ++j) {
vbo.push_back(g_positions[g_coarseEdges[i+j]*3]);
vbo.push_back(g_positions[g_coarseEdges[i+j]*3+1]);
vbo.push_back(g_positions[g_coarseEdges[i+j]*3+2]);
vbo.push_back(r);
vbo.push_back(g);
vbo.push_back(b);
}
}
glBindVertexArray(g_cageEdgeVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_cageEdgeVBO);
glBufferData(GL_ARRAY_BUFFER, (int)vbo.size() * sizeof(float), &vbo[0],
GL_STATIC_DRAW);
glEnableVertexAttribArray(g_defaultProgram.attrPosition);
glEnableVertexAttribArray(g_defaultProgram.attrColor);
glVertexAttribPointer(g_defaultProgram.attrPosition,
3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, 0);
glVertexAttribPointer(g_defaultProgram.attrColor,
3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, (void*)12);
glDrawArrays(GL_LINES, 0, (int)g_coarseEdges.size());
glBindVertexArray(0);
glUseProgram(0);
}
//------------------------------------------------------------------------------
static void
drawCageVertices() {
glUseProgram(g_defaultProgram.program);
glUniformMatrix4fv(g_defaultProgram.uniformModelViewProjectionMatrix,
1, GL_FALSE, g_transformData.ModelViewProjectionMatrix);
int numPoints = (int)g_positions.size()/3;
std::vector<float> vbo;
vbo.reserve(numPoints*6);
float r, g, b;
for (int i = 0; i < numPoints; ++i) {
switch (g_drawMode) {
case kVARYING : { r=g_varyingColors[i*3+0];
g=g_varyingColors[i*3+1];
b=g_varyingColors[i*3+2];
} break;
case kUV : { setSharpnessColor(g_coarseVertexSharpness[i], &r, &g, &b);
} break;
default : break;
}
vbo.push_back(g_positions[i*3+0]);
vbo.push_back(g_positions[i*3+1]);
vbo.push_back(g_positions[i*3+2]);
vbo.push_back(r);
vbo.push_back(g);
vbo.push_back(b);
}
glBindVertexArray(g_cageVertexVAO);
glBindBuffer(GL_ARRAY_BUFFER, g_cageVertexVBO);
glBufferData(GL_ARRAY_BUFFER, (int)vbo.size() * sizeof(float), &vbo[0],
GL_STATIC_DRAW);
glEnableVertexAttribArray(g_defaultProgram.attrPosition);
glEnableVertexAttribArray(g_defaultProgram.attrColor);
glVertexAttribPointer(g_defaultProgram.attrPosition,
3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, 0);
glVertexAttribPointer(g_defaultProgram.attrColor,
3, GL_FLOAT, GL_FALSE, sizeof (GLfloat) * 6, (void*)12);
glPointSize(10.0f);
glDrawArrays(GL_POINTS, 0, numPoints);
glPointSize(1.0f);
glBindVertexArray(0);
glUseProgram(0);
}
//------------------------------------------------------------------------------
static void
drawSamples() {
glUseProgram(g_defaultProgram.program);
glUniformMatrix4fv(g_defaultProgram.uniformModelViewProjectionMatrix,
1, GL_FALSE, g_transformData.ModelViewProjectionMatrix);
glBindVertexArray(g_samplesVAO);
glPointSize(2.0f);
glDrawArrays(GL_POINTS, 0, g_nparticles);
glPointSize(1.0f);
glBindVertexArray(0);
glUseProgram(0);
}
//------------------------------------------------------------------------------
static void
display() {
g_hud.GetFrameBuffer()->Bind();
Stopwatch s;
s.Start();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport(0, 0, g_width, g_height);
double aspect = g_width/(double)g_height;
identity(g_transformData.ModelViewMatrix);
translate(g_transformData.ModelViewMatrix, -g_pan[0], -g_pan[1], -g_dolly);
rotate(g_transformData.ModelViewMatrix, g_rotate[1], 1, 0, 0);
rotate(g_transformData.ModelViewMatrix, g_rotate[0], 0, 1, 0);
rotate(g_transformData.ModelViewMatrix, -90, 1, 0, 0);
translate(g_transformData.ModelViewMatrix,
-g_center[0], -g_center[1], -g_center[2]);
perspective(g_transformData.ProjectionMatrix,
45.0f, (float)aspect, 0.01f, 500.0f);
multMatrix(g_transformData.ModelViewProjectionMatrix,
g_transformData.ModelViewMatrix,
g_transformData.ProjectionMatrix);
glEnable(GL_DEPTH_TEST);
s.Stop();
float drawCpuTime = float(s.GetElapsed() * 1000.0f);
s.Start();
glFinish();
s.Stop();
float drawGpuTime = float(s.GetElapsed() * 1000.0f);
drawSamples();
if (g_drawCageEdges)
drawCageEdges();
if (g_drawCageVertices)
drawCageVertices();
g_hud.GetFrameBuffer()->ApplyImageShader();
if (g_hud.IsVisible()) {
g_fpsTimer.Stop();
double fps = 1.0/g_fpsTimer.GetElapsed();
g_fpsTimer.Start();
g_hud.DrawString(10, -150, "Particle Speed ([) (]): %.1f", g_particles->GetSpeed());
g_hud.DrawString(10, -120, "# Samples : (%d/%d)", g_nsamplesFound, g_Q->GetNumVertices());
g_hud.DrawString(10, -100, "Compute : %.3f ms", g_computeTime);
g_hud.DrawString(10, -80, "Eval : %.3f ms", g_evalTime * 1000.f);
g_hud.DrawString(10, -60, "GPU Draw : %.3f ms", drawGpuTime);
g_hud.DrawString(10, -40, "CPU Draw : %.3f ms", drawCpuTime);
g_hud.DrawString(10, -20, "FPS : %3.1f", fps);
if (g_drawMode==kFACEVARYING and g_evalCtx->GetFVarData().empty()) {
static char msg[21] = "No Face-Varying Data";
g_hud.DrawString(g_width/2-20/2*8, g_height/2, msg);
}
g_hud.Flush();
}
glFinish();
checkGLErrors("display leave");
}
//------------------------------------------------------------------------------
static void
idle() {
if (not g_freeze)
g_frame++;
updateGeom();
if (g_repeatCount != 0 and g_frame >= g_repeatCount)
g_running = 0;
}
//------------------------------------------------------------------------------
static void
motion(GLFWwindow *, double dx, double dy) {
int x=(int)dx, y=(int)dy;
if (g_mbutton[0] && !g_mbutton[1] && !g_mbutton[2]) {
// orbit
g_rotate[0] += x - g_prev_x;
g_rotate[1] += y - g_prev_y;
} else if (!g_mbutton[0] && !g_mbutton[1] && g_mbutton[2]) {
// pan
g_pan[0] -= g_dolly*(x - g_prev_x)/g_width;
g_pan[1] += g_dolly*(y - g_prev_y)/g_height;
} else if ((g_mbutton[0] && !g_mbutton[1] && g_mbutton[2]) or
(!g_mbutton[0] && g_mbutton[1] && !g_mbutton[2])) {
// dolly
g_dolly -= g_dolly*0.01f*(x - g_prev_x);
if(g_dolly <= 0.01) g_dolly = 0.01f;
}
g_prev_x = x;
g_prev_y = y;
}
//------------------------------------------------------------------------------
static void
mouse(GLFWwindow *, int button, int state, int /* mods */) {
if (button == 0 && state == GLFW_PRESS && g_hud.MouseClick(g_prev_x, g_prev_y))
return;
if (button < 3) {
g_mbutton[button] = (state == GLFW_PRESS);
}
}
//------------------------------------------------------------------------------
static void
reshape(GLFWwindow *, int width, int height) {
g_width = width;
g_height = height;
int windowWidth = g_width, windowHeight = g_height;
// window size might not match framebuffer size on a high DPI display
glfwGetWindowSize(g_window, &windowWidth, &windowHeight);
g_hud.Rebuild(windowWidth, windowHeight, width, height);
}
//------------------------------------------------------------------------------
void windowClose(GLFWwindow*) {
g_running = false;
}
//------------------------------------------------------------------------------
static void
setSamples(bool add) {
g_nsamples += add ? 50 : -50;
g_nsamples = std::max(0, g_nsamples);
createOsdMesh(g_defaultShapes[g_currentShape], g_level);
}
//------------------------------------------------------------------------------
static void
keyboard(GLFWwindow *, int key, int /* scancode */, int event, int /* mods */) {
if (event == GLFW_RELEASE) return;
if (g_hud.KeyDown(tolower(key))) return;
switch (key) {
case 'Q': g_running = 0; break;
case '=': setSamples(true); break;
case '-': setSamples(false); break;
case '[': if (g_particles) {
g_particles->SetSpeed(g_particles->GetSpeed()-0.1f);
} break;
case ']': if (g_particles) {
g_particles->SetSpeed(g_particles->GetSpeed()+0.1f);
} break;
case GLFW_KEY_ESCAPE: g_hud.SetVisible(!g_hud.IsVisible()); break;
}
}
//------------------------------------------------------------------------------
static void
callbackError(OpenSubdiv::Osd::ErrorType err, const char *message) {
printf("OsdError: %d\n", err);
printf("%s", message);
}
//------------------------------------------------------------------------------
static void
callbackModel(int m) {
if (m < 0)
m = 0;
if (m >= (int)g_defaultShapes.size())
m = (int)g_defaultShapes.size() - 1;
g_currentShape = m;
createOsdMesh(g_defaultShapes[g_currentShape], g_level);
}
//------------------------------------------------------------------------------
static void
callbackLevel(int l) {
g_level = l;
createOsdMesh(g_defaultShapes[g_currentShape], g_level);
}
//------------------------------------------------------------------------------
static void
callbackAnimate(bool checked, int /* m */) {
g_moveScale = checked * 3.0f;
}
//------------------------------------------------------------------------------
static void
callbackFreeze(bool checked, int /* f */) {
g_freeze = checked;
}
//------------------------------------------------------------------------------
static void
callbackCentered(bool checked, int /* f */) {
g_randomStart = !checked;
createOsdMesh(g_defaultShapes[g_currentShape], g_level);
}
//------------------------------------------------------------------------------
static void
callbackDisplayCageVertices(bool checked, int /* d */) {
g_drawCageVertices = checked;
}
//------------------------------------------------------------------------------
static void
callbackDisplayCageEdges(bool checked, int /* d */) {
g_drawCageEdges = checked;
}
//------------------------------------------------------------------------------
static void
callbackDisplayVaryingColors(int mode) {
g_drawMode = mode;
createOsdMesh(g_defaultShapes[g_currentShape], g_level);
}
//------------------------------------------------------------------------------
static void
initHUD() {
int windowWidth = g_width, windowHeight = g_height,
frameBufferWidth = g_width, frameBufferHeight = g_height;
// window size might not match framebuffer size on a high DPI display
glfwGetWindowSize(g_window, &windowWidth, &windowHeight);
glfwGetFramebufferSize(g_window, &frameBufferWidth, &frameBufferHeight);
g_hud.Init(windowWidth, windowHeight, frameBufferWidth, frameBufferHeight);
g_hud.SetFrameBuffer(new GLFrameBuffer);
g_hud.AddCheckBox("Cage Edges (H)", true, 10, 10, callbackDisplayCageEdges, 0, 'h');
g_hud.AddCheckBox("Cage Verts (J)", true, 10, 30, callbackDisplayCageVertices, 0, 'j');
g_hud.AddCheckBox("Animate vertices (M)", g_moveScale != 0, 10, 50, callbackAnimate, 0, 'm');
g_hud.AddCheckBox("Freeze (spc)", false, 10, 70, callbackFreeze, 0, ' ');
g_hud.AddCheckBox("Random Start", false, 10, 120, callbackCentered, 0);
int shading_pulldown = g_hud.AddPullDown("Shading (W)", 250, 10, 250, callbackDisplayVaryingColors, 'w');
g_hud.AddPullDownButton(shading_pulldown, "Random", kRANDOM, g_drawMode==kRANDOM);
g_hud.AddPullDownButton(shading_pulldown, "(u,v)", kUV, g_drawMode==kUV);
g_hud.AddPullDownButton(shading_pulldown, "Varying", kVARYING, g_drawMode==kVARYING);
g_hud.AddPullDownButton(shading_pulldown, "FaceVarying", kFACEVARYING, g_drawMode==kFACEVARYING);
for (int i = 1; i < 11; ++i) {
char level[16];
sprintf(level, "Lv. %d", i);
g_hud.AddRadioButton(3, level, i==g_level, 10, 170+i*20, callbackLevel, i, '0'+(i%10));
}
int pulldown_handle = g_hud.AddPullDown("Shape (N)", -300, 10, 300, callbackModel, 'n');
for (int i = 0; i < (int)g_defaultShapes.size(); ++i) {
g_hud.AddPullDownButton(pulldown_handle, g_defaultShapes[i].name.c_str(),i);
}
g_hud.Rebuild(windowWidth, windowHeight, frameBufferWidth, frameBufferHeight);
}
//------------------------------------------------------------------------------
static void
initGL() {
glClearColor(0.1f, 0.1f, 0.1f, 0.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glCullFace(GL_BACK);
glEnable(GL_CULL_FACE);
glGenVertexArrays(1, &g_cageVertexVAO);
glGenVertexArrays(1, &g_cageEdgeVAO);
glGenVertexArrays(1, &g_samplesVAO);
glGenBuffers(1, &g_cageVertexVBO);
glGenBuffers(1, &g_cageEdgeVBO);
}
//------------------------------------------------------------------------------
static void
uninitGL() {
glDeleteBuffers(1, &g_cageVertexVBO);
glDeleteBuffers(1, &g_cageEdgeVBO);
glDeleteVertexArrays(1, &g_cageVertexVAO);
glDeleteVertexArrays(1, &g_cageEdgeVAO);
glDeleteVertexArrays(1, &g_samplesVAO);
}
//------------------------------------------------------------------------------
static void
setGLCoreProfile() {
#define glfwOpenWindowHint glfwWindowHint
#define GLFW_OPENGL_VERSION_MAJOR GLFW_CONTEXT_VERSION_MAJOR
#define GLFW_OPENGL_VERSION_MINOR GLFW_CONTEXT_VERSION_MINOR
glfwOpenWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
#if not defined(__APPLE__)
glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, 4);
glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, 2);
#else
glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, 3);
glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, 2);
#endif
glfwOpenWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
}
//------------------------------------------------------------------------------
int main(int argc, char **argv) {
bool fullscreen = false;
std::string str;
for (int i = 1; i < argc; ++i) {
if (!strcmp(argv[i], "-f"))
fullscreen = true;
else {
std::ifstream ifs(argv[1]);
if (ifs) {
std::stringstream ss;
ss << ifs.rdbuf();
ifs.close();
str = ss.str();
g_defaultShapes.push_back(ShapeDesc(argv[1], str.c_str(), kCatmark));
}
}
}
Osd::SetErrorCallback(callbackError);
initShapes();
if (not glfwInit()) {
printf("Failed to initialize GLFW\n");
return 1;
}
static const char windowTitle[] = "OpenSubdiv glEvalLimit " OPENSUBDIV_VERSION_STRING;
#define CORE_PROFILE
#ifdef CORE_PROFILE
setGLCoreProfile();
#endif
if (fullscreen) {
g_primary = glfwGetPrimaryMonitor();
// apparently glfwGetPrimaryMonitor fails under linux : if no primary,
// settle for the first one in the list
if (not g_primary) {
int count=0;
GLFWmonitor ** monitors = glfwGetMonitors(&count);
if (count)
g_primary = monitors[0];
}
if (g_primary) {
GLFWvidmode const * vidmode = glfwGetVideoMode(g_primary);
g_width = vidmode->width;
g_height = vidmode->height;
}
}
if (not (g_window=glfwCreateWindow(g_width, g_height, windowTitle,
fullscreen and g_primary ? g_primary : NULL, NULL))) {
printf("Failed to open window.\n");
glfwTerminate();
return 1;
}
glfwMakeContextCurrent(g_window);
// accommodate high DPI displays (e.g. mac retina displays)
glfwGetFramebufferSize(g_window, &g_width, &g_height);
glfwSetFramebufferSizeCallback(g_window, reshape);
glfwSetKeyCallback(g_window, keyboard);
glfwSetCursorPosCallback(g_window, motion);
glfwSetMouseButtonCallback(g_window, mouse);
glfwSetWindowCloseCallback(g_window, windowClose);
#if defined(OSD_USES_GLEW)
#ifdef CORE_PROFILE
// this is the only way to initialize glew correctly under core profile context.
glewExperimental = true;
#endif
if (GLenum r = glewInit() != GLEW_OK) {
printf("Failed to initialize glew. Error = %s\n", glewGetErrorString(r));
exit(1);
}
#ifdef CORE_PROFILE
// clear GL errors which was generated during glewInit()
glGetError();
#endif
#endif
//std::string & data = g_defaultShapes[ g_currentShape ].data;
//Scheme scheme = g_defaultShapes[ g_currentShape ].scheme;
//createOsdMesh( data, g_level, scheme );
initGL();
linkDefaultProgram();
glfwSwapInterval(0);
initHUD();
callbackModel(g_currentShape);
while (g_running) {
idle();
display();
glfwPollEvents();
glfwSwapBuffers(g_window);
glFinish();
}
uninitGL();
glfwTerminate();
}
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