/// @overload QGLWidget
void paintGL(){
vao.bind();
program.bind();
{
///--- Update modelview
#ifdef WITH_QGLVIEWER
/// use the trackball to specify the matrices
setup_modelview(camera(), program);
#else
///--- simple unit cube orthographic view
static Eigen::Matrix4f M = Eigen::Matrix4f::Identity();
static Eigen::Matrix4f P = Eigen::ortho(-1.0f, +1.0f, -1.0f, +1.0f, -1.0f, +1.0f);
static Eigen::Matrix4f V = Eigen::Matrix4f::Identity();
static Eigen::Matrix4f MV = V*M;
static Eigen::Matrix4f MVP = P*MV;
GLint MVP_id = glGetUniformLocation(program.programId(), "MVP");
glUniformMatrix4fv(MVP_id, 1, GL_FALSE, MVP.data());
GLint MV_id = glGetUniformLocation(program.programId(), "MV");
glUniformMatrix4fv(MV_id, 1, GL_FALSE, MV.data());
#endif
///--- clear & draw
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
glDrawElements(GL_TRIANGLES, triangles.size(), GL_UNSIGNED_INT, 0);
}
vao.release();
program.release();
}
static void drawTree(QGLShaderProgram& prog, const TransformState& transState, const OctreeNode* node)
{
Imath::Box3f bbox(node->center - Imath::V3f(node->halfWidth),
node->center + Imath::V3f(node->halfWidth));
drawBox(transState, bbox, Imath::C3f(1), prog.programId());
drawBox(transState, node->bbox, Imath::C3f(1,0,0), prog.programId());
for (int i = 0; i < 8; ++i)
{
OctreeNode* n = node->children[i];
if (n)
drawTree(prog, transState, n);
}
}
void Annotation::draw(QGLShaderProgram& annotationShaderProg,
const TransformState& transState) const
{
glBindVertexArray(m_vao);
GLint texture0 = glGetUniformLocation(annotationShaderProg.programId(),
"texture0");
m_texture->bind(texture0);
annotationShaderProg.setUniformValue("annotationSize",
m_texture->width(),
m_texture->height());
transState.translate(m_position)
.setUniforms(annotationShaderProg.programId());
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindTexture(GL_TEXTURE_2D, 0);
glBindVertexArray(0);
}
void TriMesh::drawFaces(QGLShaderProgram& prog,
const TransformState& transState) const
{
// TODO: The hasTexture uniform shader variable would be unnecessary if we
// supported more than one mesh face shader...
GLint hasTextureLoc = glGetUniformLocation(prog.programId(), "hasTexture");
if (m_texture)
{
GLint textureSamplerLoc = glGetUniformLocation(prog.programId(), "texture0");
if (textureSamplerLoc != -1)
m_texture->bind(textureSamplerLoc);
}
if (hasTextureLoc != -1)
glUniform1i(hasTextureLoc, m_texture ? 1 : 0);
unsigned int vertexShaderId = shaderId("meshface");
unsigned int vertexArray = getVAO("meshface");
transState.translate(offset()).setUniforms(vertexShaderId);
glBindVertexArray(vertexArray);
glDrawElements(GL_TRIANGLES, (GLsizei)m_triangles.size(), GL_UNSIGNED_INT, 0);
glBindVertexArray(0);
}
void TriMesh::drawEdges(QGLShaderProgram& prog,
const TransformState& transState) const
{
transState.translate(offset()).setUniforms(prog.programId());
prog.enableAttributeArray("position");
prog.setAttributeArray("position", GL_FLOAT, &m_verts[0], 3);
if (m_colors.size() == m_verts.size())
{
prog.enableAttributeArray("color");
prog.setAttributeArray("color", GL_FLOAT, &m_colors[0], 3);
}
else
prog.setAttributeValue("color", GLfloat(1), GLfloat(1), GLfloat(1));
glDrawElements(GL_LINES, (GLsizei)m_edges.size(),
GL_UNSIGNED_INT, &m_edges[0]);
prog.disableAttributeArray("color");
prog.disableAttributeArray("position");
}
DrawCount PointArray::drawPoints(QGLShaderProgram& prog, const TransformState& transState,
double quality, bool incrementalDraw) const
{
TransformState relativeTrans = transState.translate(offset());
relativeTrans.setUniforms(prog.programId());
//printActiveShaderAttributes(prog.programId());
std::vector<ShaderAttribute> activeAttrs = activeShaderAttributes(prog.programId());
// Figure out shader locations for each point field
// TODO: attributeLocation() forces the OpenGL usage here to be
// synchronous. Does this matter? (Alternative: bind them ourselves.)
std::vector<const ShaderAttribute*> attributes;
for (size_t i = 0; i < m_fields.size(); ++i)
{
const GeomField& field = m_fields[i];
if (field.spec.isArray())
{
for (int j = 0; j < field.spec.count; ++j)
{
std::string name = tfm::format("%s[%d]", field.name, j);
attributes.push_back(findAttr(name, activeAttrs));
}
}
else
{
attributes.push_back(findAttr(field.name, activeAttrs));
}
}
// Zero out active attributes in case they don't have associated fields
GLfloat zeros[16] = {0};
for (size_t i = 0; i < activeAttrs.size(); ++i)
{
prog.setAttributeValue((int)i, zeros, activeAttrs[i].rows,
activeAttrs[i].cols);
}
// Enable attributes which have associated fields
for (size_t i = 0; i < attributes.size(); ++i)
{
if (attributes[i])
prog.enableAttributeArray(attributes[i]->location);
}
DrawCount drawCount;
ClipBox clipBox(relativeTrans);
// Draw points in each bucket, with total number drawn depending on how far
// away the bucket is. Since the points are shuffled, this corresponds to
// a stochastic simplification of the full point cloud.
V3f relCamera = relativeTrans.cameraPos();
std::vector<const OctreeNode*> nodeStack;
nodeStack.push_back(m_rootNode.get());
while (!nodeStack.empty())
{
const OctreeNode* node = nodeStack.back();
nodeStack.pop_back();
if (clipBox.canCull(node->bbox))
continue;
if (!node->isLeaf())
{
for (int i = 0; i < 8; ++i)
{
OctreeNode* n = node->children[i];
if (n)
nodeStack.push_back(n);
}
continue;
}
size_t idx = node->beginIndex;
if (!incrementalDraw)
node->nextBeginIndex = node->beginIndex;
DrawCount nodeDrawCount = node->drawCount(relCamera, quality, incrementalDraw);
drawCount += nodeDrawCount;
idx = node->nextBeginIndex;
if (nodeDrawCount.numVertices == 0)
continue;
for (size_t i = 0, k = 0; i < m_fields.size(); k+=m_fields[i].spec.arraySize(), ++i)
{
const GeomField& field = m_fields[i];
int arraySize = field.spec.arraySize();
int vecSize = field.spec.vectorSize();
for (int j = 0; j < arraySize; ++j)
{
const ShaderAttribute* attr = attributes[k+j];
if (!attr)
continue;
char* data = field.data.get() + idx*field.spec.size() +
j*field.spec.elsize;
if (attr->baseType == TypeSpec::Int || attr->baseType == TypeSpec::Uint)
{
glVertexAttribIPointer(attr->location, vecSize,
glBaseType(field.spec), 0, data);
}
else
{
glVertexAttribPointer(attr->location, vecSize,
glBaseType(field.spec),
field.spec.fixedPoint, 0, data);
}
}
}
glDrawArrays(GL_POINTS, 0, (GLsizei)nodeDrawCount.numVertices);
node->nextBeginIndex += nodeDrawCount.numVertices;
}
//tfm::printf("Drew %d of total points %d, quality %f\n", totDraw, m_npoints, quality);
// Disable all attribute arrays - leaving these enabled seems to screw with
// the OpenGL fixed function pipeline in unusual ways.
for (size_t i = 0; i < attributes.size(); ++i)
{
if (attributes[i])
prog.disableAttributeArray(attributes[i]->location);
}
return drawCount;
}
DrawCount PointArray::drawPoints(QGLShaderProgram& prog, const TransformState& transState,
double quality, bool incrementalDraw) const
{
GLuint vao = getVAO("points");
glBindVertexArray(vao);
GLuint vbo = getVBO("point_buffer");
glBindBuffer(GL_ARRAY_BUFFER, vbo);
TransformState relativeTrans = transState.translate(offset());
relativeTrans.setUniforms(prog.programId());
//printActiveShaderAttributes(prog.programId());
std::vector<ShaderAttribute> activeAttrs = activeShaderAttributes(prog.programId());
// Figure out shader locations for each point field
// TODO: attributeLocation() forces the OpenGL usage here to be
// synchronous. Does this matter? (Alternative: bind them ourselves.)
std::vector<const ShaderAttribute*> attributes;
for (size_t i = 0; i < m_fields.size(); ++i)
{
const GeomField& field = m_fields[i];
if (field.spec.isArray())
{
for (int j = 0; j < field.spec.count; ++j)
{
std::string name = tfm::format("%s[%d]", field.name, j);
attributes.push_back(findAttr(name, activeAttrs));
}
}
else
{
attributes.push_back(findAttr(field.name, activeAttrs));
}
}
// Zero out active attributes in case they don't have associated fields
GLfloat zeros[16] = {0};
for (size_t i = 0; i < activeAttrs.size(); ++i)
{
prog.setAttributeValue((int)i, zeros, activeAttrs[i].rows,
activeAttrs[i].cols);
}
// Enable attributes which have associated fields
for (size_t i = 0; i < attributes.size(); ++i)
{
if (attributes[i])
prog.enableAttributeArray(attributes[i]->location);
}
DrawCount drawCount;
ClipBox clipBox(relativeTrans);
// Draw points in each bucket, with total number drawn depending on how far
// away the bucket is. Since the points are shuffled, this corresponds to
// a stochastic simplification of the full point cloud.
V3f relCamera = relativeTrans.cameraPos();
std::vector<const OctreeNode*> nodeStack;
nodeStack.push_back(m_rootNode.get());
while (!nodeStack.empty())
{
const OctreeNode* node = nodeStack.back();
nodeStack.pop_back();
if (clipBox.canCull(node->bbox))
continue;
if (!node->isLeaf())
{
for (int i = 0; i < 8; ++i)
{
OctreeNode* n = node->children[i];
if (n)
nodeStack.push_back(n);
}
continue;
}
size_t idx = node->beginIndex;
if (!incrementalDraw)
node->nextBeginIndex = node->beginIndex;
DrawCount nodeDrawCount = node->drawCount(relCamera, quality, incrementalDraw);
drawCount += nodeDrawCount;
idx = node->nextBeginIndex;
if (nodeDrawCount.numVertices == 0)
continue;
if (m_fields.size() < 1)
continue;
long bufferSize = 0;
for (size_t i = 0; i < m_fields.size(); ++i)
{
const GeomField &field = m_fields[i];
unsigned int arraySize = field.spec.arraySize();
unsigned int vecSize = field.spec.vectorSize();
// tfm::printfln("FIELD-NAME: %s", field.name);
// tfm::printfln("AS: %i, VS: %i, FSS: %i, FSES: %i, GLBTFSS: %i", arraySize, vecSize, field.spec.size(), field.spec.elsize, sizeof(glBaseType(field.spec)));
bufferSize += arraySize * vecSize * field.spec.elsize; //sizeof(glBaseType(field.spec));
}
bufferSize = bufferSize * (GLsizei)nodeDrawCount.numVertices;
// TODO: might be able to do something more efficient here, for example use glBufferSubData to avoid re-allocation of memory by glBufferData
// INITIALIZE THE BUFFER TO FULL SIZE
// tfm::printfln("INIT BUFFER: %i, BS: %i", vbo, bufferSize);
glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)bufferSize, NULL, GL_STREAM_DRAW);
/// ========================================================================
/// ========================================================================
GLintptr bufferOffset = 0;
for (size_t i = 0, k = 0; i < m_fields.size(); k+=m_fields[i].spec.arraySize(), ++i)
{
const GeomField& field = m_fields[i];
int arraySize = field.spec.arraySize();
int vecSize = field.spec.vectorSize();
// TODO: should use a single data-array that isn't split into vertex / normal / color / etc. sections, but has interleaved data ?
// OpenGL has a stride value in glVertexAttribPointer for exactly this purpose, which should be used for better efficiency
// here we write only the current attribute data into this the buffer (e.g. all positions, then all colors)
bufferSize = arraySize * vecSize * field.spec.elsize * (GLsizei)nodeDrawCount.numVertices; //sizeof(glBaseType(field.spec))
char* bufferData = field.data.get() + idx*field.spec.size();
glBufferSubData(GL_ARRAY_BUFFER, bufferOffset, bufferSize, bufferData);
// tfm::printfln("UPDATE BUFFER: %i, BS: %i", vbo, bufferSize);
for (int j = 0; j < arraySize; ++j)
{
const ShaderAttribute* attr = attributes[k+j];
if (!attr)
continue;
// we have to create an intermediate buffer offsets for glVertexAttribPointer, but we can still upload the whole data array earlier !?
GLintptr intermediate_bufferOffset = bufferOffset + j*field.spec.elsize;
if (attr->baseType == TypeSpec::Int || attr->baseType == TypeSpec::Uint)
{
glVertexAttribIPointer(attr->location, vecSize,
glBaseType(field.spec), 0, (const GLvoid *)intermediate_bufferOffset);
}
else
{
glVertexAttribPointer(attr->location, vecSize,
glBaseType(field.spec),
field.spec.fixedPoint, 0, (const GLvoid *)intermediate_bufferOffset);
}
glEnableVertexAttribArray(attr->location);
}
bufferOffset += bufferSize;
}
glDrawArrays(GL_POINTS, 0, (GLsizei)nodeDrawCount.numVertices);
node->nextBeginIndex += nodeDrawCount.numVertices;
}
//tfm::printf("Drew %d of total points %d, quality %f\n", totDraw, m_npoints, quality);
// Disable all attribute arrays - leaving these enabled seems to screw with
// the OpenGL fixed function pipeline in unusual ways.
for (size_t i = 0; i < attributes.size(); ++i)
{
if (attributes[i])
prog.disableAttributeArray(attributes[i]->location);
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
return drawCount;
}