/// @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();
}
void Exercise20::paintGL()
{
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
QGLShaderProgram* currentProg;
if (m_shadingMode == Toon_Shading)
{
currentProg = m_prog_toon;
}
else
{
currentProg = m_prog_phong;
}
currentProg->bind();
setupLightUniforms(currentProg);
setupMaterialUniforms(currentProg);
glLoadMatrixf(m_view.data());
glPushMatrix();
glRotatef(static_cast<float>(m_frame % (4 * 360)) * 0.25f, 0.f, 1.f, 0.f);
glScalef(1.f, 1.f, 1.f);
draw();
glPopMatrix();
currentProg->release();
}
void NightModeGraphicsEffect::draw(QPainter* painter)
{
int pixelRatio = painter->device()->devicePixelRatio();
QSize size(painter->device()->width() * pixelRatio, painter->device()->height() * pixelRatio);
if (fbo && fbo->size() != size)
{
delete fbo;
fbo = NULL;
}
if (!fbo)
{
QGLFramebufferObjectFormat format;
format.setAttachment(QGLFramebufferObject::CombinedDepthStencil);
format.setInternalTextureFormat(GL_RGBA);
fbo = new NightModeGraphicsEffectFbo(size, format, pixelRatio);
}
QPainter fboPainter(fbo);
drawSource(&fboPainter);
painter->save();
painter->beginNativePainting();
program->bind();
const GLfloat pos[] = {-1, -1, +1, -1, -1, +1, +1, +1};
const GLfloat texCoord[] = {0, 0, 1, 0, 0, 1, 1, 1};
program->setUniformValue(vars.source, 0);
program->setAttributeArray(vars.pos, pos, 2);
program->setAttributeArray(vars.texCoord, texCoord, 2);
program->enableAttributeArray(vars.pos);
program->enableAttributeArray(vars.texCoord);
glBindTexture(GL_TEXTURE_2D, fbo->texture());
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
program->release();
painter->endNativePainting();
painter->restore();
}
/// @overload QGLWidget
void paintGL(){
program.bind();
vao.bind();
glClear(GL_COLOR_BUFFER_BIT);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); ///< we have 4 verts
vao.release();
program.release();
}
// --------------------------------------------------------
void TouchWidgetRenderer::drawHollowCircle( GLResourceContainer * container, const QPointF & pos, qreal radius, qreal alpha, const QColor & color, qreal thickness, qreal blur_multiplier ) const
{
QSizeF size(2*radius, 2*radius);
QGLShaderProgram * shader = container->shaderProgram("circle");
shader->bind();
shader->setUniformValue("thickness", 1.0f/(GLfloat)size.width()*(float)thickness);
shader->setUniformValue("blur", (float) thickness*(float)blur_multiplier);
//shader->setUniformValue("blur", (float) radius);
shader->setUniformValue("alpha", (float) (this->alpha()*alpha));
shader->setUniformValue("color", color);
drawQuad(pos, size, 0, 1.0f /* ignored by shader anyway */);
shader->release();
}
/// @overload QGLWidget
void initializeGL(){
printf("OpenGL %d.%d\n",this->format().majorVersion(),this->format().minorVersion());
///--- Create an array object to store properties
{
bool success = vao.create();
Q_ASSERT(success);
vao.bind();
}
///--- Load/compile shaders
{
bool vok = program.addShaderFromSourceCode(QGLShader::Vertex, vshader);
bool fok = program.addShaderFromSourceCode(QGLShader::Fragment, fshader);
bool lok = program.link ();
Q_ASSERT(lok && vok && fok);
bool success = program.bind();
Q_ASSERT(success);
}
///--- Create vertex buffer/attributes "position"
{
static float vertices[] = {
-1.0000,-1.0000,+0.0000,
+1.0000,-1.0000,+0.0000,
-1.0000,+1.0000,+0.0000,
+1.0000,+1.0000,+0.0000,};
vertexbuffer = QGLBuffer(QGLBuffer::VertexBuffer);
bool success = vertexbuffer.create();
Q_ASSERT(success);
vertexbuffer.setUsagePattern( QGLBuffer::StaticDraw );
success = vertexbuffer.bind();
Q_ASSERT(success);
vertexbuffer.allocate( vertices, sizeof(vertices) );
program.setAttributeBuffer("position", GL_FLOAT, 0, 3 );
program.enableAttributeArray("position");
}
///--- Unbind to avoid pollution
vao.release();
program.release();
///--- Background
glClearColor(1.0, 1.0, 1.0, 1.0);
///--- Setup opengl flags
glDisable(GL_DEPTH_TEST);
}
// --------------------------------------------------------
void TouchWidgetRenderer::drawMagnifyingGlass(
GLResourceContainer * container,
const MagnifyingGlass * mg,
float alpha ) const
{
// draw contents to fbo
QGLFramebufferObject * fbo = container->framebufferObject("mg_fbo");
drawSceneToFbo(fbo, mg->srcCenter(), mg->srcSize(), mg->angle());
//qDebug() << "drawing mg " << mg << mg->dstCenter() << mg->dstSize();
// draw magnifying glass including contents
QGLShaderProgram * shader = container->shaderProgram("mglass");
shader->bind();
shader->setUniformValue("mglass_tex", 0);
shader->setUniformValue("content_tex", 1);
shader->setUniformValue("alpha", this->alpha()*alpha);
glActiveTexture(GL_TEXTURE0); glBindTexture(GL_TEXTURE_2D, container->texture("mglass"));
glActiveTexture(GL_TEXTURE1); glBindTexture(GL_TEXTURE_2D, fbo->texture());
drawQuad(mg->dstCenter(), mg->dstSize(), -mg->angle(), this->alpha()*alpha);
shader->release();
}
void GLWidget::paintGL()
{
GLenum errCode;
// First pass for shadowmapping
QGLShaderProgram * p;
Camera * cam;
Light * light;
if (this->debugMode != 3) {
for (int i = 0; i < this->_lights.size(); i++) {
light = this->_lights.at(i);
if (!light->initializedFBO) {
light->initializeShadowFBO(QSize(this->_screenWidth, this->_screenHeight));
return;
}
if (this->debugMode != 4) {
light->bindFBO();
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glCullFace(GL_FRONT);
if (this->debugMode == 4) {
p = this->_program;
p = this->_shadowProgram;
} else {
glViewport(0,0, this->_screenWidth/2, this->_screenHeight/2);
p = this->_shadowProgram;
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
cam = this->_lights.at(i)->camera;
p->bind();
// wont be used in shadow program
p->setUniformValue("debug_mode", 4);
cam->injectToShader(p);
for (int i = 0; i < this->_objects.size(); i++) {
this->_objects.at(i)->injectToShader(p);
}
if (this->debugMode == 4) {
p->release();
return;
}
light->releaseFBO();
p->release();
}
}
if (this->showDebug) {
// DEBUG only. this piece of code draw the depth buffer onscreen
glBindFramebuffer(GL_FRAMEBUFFER,0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
this->_shadowProgram->release();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-this->_screenWidth/2, this->_screenWidth/2, -this->_screenHeight/2, this->_screenHeight/2, 1, 60);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glColor4f(1,1,1,1);
this->_lights.at(0)->bindDebugShadowMap();
glEnable(GL_TEXTURE_2D);
glTranslated(0,0,-1);
glBegin(GL_QUADS);
glTexCoord2d(0,0);glVertex3f(0,0,0);
glTexCoord2d(1,0);glVertex3f(_screenWidth/2,0,0);
glTexCoord2d(1,1);glVertex3f(_screenWidth/2,_screenHeight/2,0);
glTexCoord2d(0,1);glVertex3f(0,_screenHeight/2,0);
glEnd();
glDisable(GL_TEXTURE_2D);
//glutSwapBuffers();
return;
}
// Second pass
p = this->_program;
cam = this->camera;
glViewport(0,0, this->_screenWidth, this->_screenHeight);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
if ((errCode = glGetError()) != GL_NO_ERROR) {
qDebug() << "GLWidget::draw after clear: " << errCode;
}
p->bind();
cam->injectToShader(p);
if ((errCode = glGetError()) != GL_NO_ERROR) {
qDebug() << "GLWidget::draw after cam: " << errCode;
}
p->setUniformValue("debug_mode", this->debugMode);
for (int i = 0; i < this->_lights.size(); i++) {
this->_lights.at(i)->injectToShader(p, i);
}
for (int i = 0; i < this->_objects.size(); i++) {
this->_objects.at(i)->injectToShader(p);
}
this->_program->release();
if ((errCode = glGetError()) != GL_NO_ERROR) {
qDebug() << "GLWidget after 2nd pas: " << errCode;
}
}
/*!
\reimp
*/
void QGLPerVertexColorEffect::setActive(QGLPainter *painter, bool flag)
{
#if defined(QGL_FIXED_FUNCTION_ONLY)
Q_UNUSED(painter);
if (flag) {
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
} else {
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
}
#else
Q_UNUSED(painter);
Q_D(QGLPerVertexColorEffect);
#if !defined(QGL_SHADERS_ONLY)
if (painter->isFixedFunction()) {
d->isFixedFunction = true;
if (flag) {
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
} else {
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
}
return;
}
#endif
static char const pvColorVertexShader[] =
"attribute highp vec4 vertex;\n"
"attribute mediump vec4 color;\n"
"uniform highp mat4 matrix;\n"
"varying mediump vec4 qColor;\n"
"void main(void)\n"
"{\n"
" gl_Position = matrix * vertex;\n"
" qColor = color;\n"
"}\n";
static char const pvColorFragmentShader[] =
"varying mediump vec4 qColor;\n"
"void main(void)\n"
"{\n"
" gl_FragColor = qColor;\n"
"}\n";
QGLShaderProgram *program =
painter->cachedProgram(QLatin1String("qt.color.pervertex"));
d->program = program;
if (!program) {
if (!flag)
return;
program = new QGLShaderProgram();
program->addShaderFromSourceCode(QGLShader::Vertex, pvColorVertexShader);
program->addShaderFromSourceCode(QGLShader::Fragment, pvColorFragmentShader);
program->bindAttributeLocation("vertex", QGL::Position);
program->bindAttributeLocation("color", QGL::Color);
if (!program->link()) {
qWarning("QGLPerVertexColorEffect::setActive(): could not link shader program");
delete program;
program = 0;
return;
}
painter->setCachedProgram(QLatin1String("qt.color.pervertex"), program);
d->program = program;
d->matrixUniform = program->uniformLocation("matrix");
program->bind();
program->enableAttributeArray(QGL::Position);
program->enableAttributeArray(QGL::Color);
} else if (flag) {
d->matrixUniform = program->uniformLocation("matrix");
program->bind();
program->enableAttributeArray(QGL::Position);
program->enableAttributeArray(QGL::Color);
} else {
program->disableAttributeArray(QGL::Position);
program->disableAttributeArray(QGL::Color);
program->release();
}
#endif
}
void View::renderScene()
{
QGLShaderProgram *shader = m_shaderPrograms["snow"];
// Render the wireframes if enabled
if( m_isWireframe ) {
glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
for(vector<SceneObject *>::iterator it = m_objects.begin(); it != m_objects.end(); it++) {
(*it)->render(m_useVbo);
}
}
// Render the solid scene
if( m_isSolid ) {
glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
// Enable cube maps and draw the skybox
if( m_showSkybox )
{
glDisable(GL_LIGHTING);
glEnable(GL_TEXTURE_CUBE_MAP);
glBindTexture(GL_TEXTURE_CUBE_MAP, m_cubeMap);
GLuint sky = ResourceLoader::loadSkybox();
glCallList(sky);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
glDisable(GL_TEXTURE_CUBE_MAP);
glEnable(GL_LIGHTING);
}
for(vector<SceneObject *>::iterator it = m_objects.begin(); it != m_objects.end(); it++) {
SceneObject *obj = *it;
if(m_useShader){
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
shader->bind();
shader->setUniformValue("snowTexture", 1);
shader->setUniformValue("snowDisplacement", 2);
shader->setUniformValue("localTexture", 3);
shader->setUniformValue("snowSurfaceTexture", 4);
shader->setUniformValue("useDisplacement", m_useDisplacement);
Vector4 color = obj->getColor();
shader->setUniformValue("color",color.x, color.y, color.z, color.w);
Vector3 scale = obj->getOriginalScale();
shader->setUniformValue("scale",scale.x, scale.y, scale.z);
shader->setUniformValue("tesselationParam", obj->getShape()->getParamOne());
// Set the blur data
int radius = 6;
int dim = radius * 2 + 1;
GLfloat kernel[dim * dim];
GLfloat offsets[dim * dim * 2];
GLfloat ambientAry[4] = {0.7, 0.7, 0.7, 1.0};
GLfloat diffuseAry[4] = {color.x, color.y, color.z, color.w};
GLfloat specularAry[4] = {0.9, 0.9, 0.9, 0.0};
GLfloat m = 0.55;
GLfloat r0 = 0.7;
ShaderAssistant::createBlurKernel(radius, width(), height(), &kernel[0], &offsets[0]);
shader->setUniformValue("arraySize", dim * dim);
shader->setUniformValueArray("offsets", offsets, 2 * dim * dim, 2);
shader->setUniformValueArray("ambient", ambientAry, 1, 4);
shader->setUniformValueArray("diffuse", diffuseAry, 1, 4);
shader->setUniformValueArray("specular", specularAry, 1, 4);
shader->setUniformValue("m", m);
shader->setUniformValue("r0", r0);
// Displacement
ResourceLoader::reloadHeightMapTexture(obj->getDisplacementMap(),obj->getDisplacementMapId());
glActiveTexture(GL_TEXTURE2);
//glUniform1i(glGetUniformLocation(shader->programId(), "snowDisplacement"), 0);
glBindTexture(GL_TEXTURE_2D,obj->getDisplacementMapId());
// Bump
glActiveTexture(GL_TEXTURE1);
//QImage img = QGLWidget::convertToGLFormat((* obj->getBumpMap()).mirrored(false,true));
if(!m_usePbo){
ResourceLoader::reloadHeightMapTexture(obj->getBumpMap(),obj->getBumpMapId());
glBindTexture(GL_TEXTURE_2D,obj->getBumpMapId());
}else{
m_pboIndexA = (m_pboIndexA + 1) % 2;
m_pboIndexB = (m_pboIndexA + 1) % 2;
glBindTexture(GL_TEXTURE_2D,obj->getBumpMapId());
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, obj->getPboBuffers()[m_pboIndexA]);
//PBO -> Texture
int width = obj->getBumpMap()->width();
int height = obj->getBumpMap()->height();
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, height, width, GL_BGRA, GL_UNSIGNED_BYTE, 0);
int imgSize = width * height* sizeof(BGRA);
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, obj->getPboBuffers()[m_pboIndexB]);
glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, imgSize, 0, GL_STREAM_DRAW_ARB);
GLubyte* ptr = (GLubyte*)glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, GL_WRITE_ONLY_ARB);
if(ptr){
unsigned char *pixel = (unsigned char *)ptr;
/*for (int i = 0; i < img.height(); i++) {
memcpy(pixel, img.scanLine(i), img.bytesPerLine());
pixel += img.bytesPerLine();
}*/
memcpy(pixel, obj->getBumpMap()->bits(), obj->getBumpMap()->byteCount());
glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB);
}
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
}
if( obj->getColorTexture() != 0 ) {
shader->setUniformValue("useLocalTexture", true);
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_2D, obj->getColorTexture());
} else {
shader->setUniformValue("useLocalTexture", false);
}
glActiveTexture(GL_TEXTURE4);
glBindTexture(GL_TEXTURE_2D, m_snowTextureId);
glActiveTexture(GL_TEXTURE0);
}
(*it)->render(m_useVbo);
if( m_useShader )
{
shader->release();
glBindTexture(GL_TEXTURE_2D,0);
glDisable(GL_BLEND);
}
}
}
glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
}
/// @overload QGLWidget
void initializeGL(){
printf("OpenGL %d.%d\n",this->format().majorVersion(),this->format().minorVersion());
///--- Background
glClearColor(1.0, 1.0, 1.0, 1.0);
///--- Viewport (simple, for unresizeable window)
glViewport(0, 0, this->width(), this->height());
///--- Setup opengl flags
glEnable(GL_DEPTH_TEST);
///--- Create the triangle index buffer
{
assert(mesh.is_triangle_mesh());
triangles.clear();
for(auto f: mesh.faces())
for(auto v: mesh.vertices(f))
triangles.push_back(v.idx());
}
///--- Create an array object to store properties
{
bool success = vao.create();
assert(success);
vao.bind();
}
///--- Load/compile shaders
{
bool vok = program.addShaderFromSourceFile(QGLShader::Vertex, ":/vshader.glsl");
bool fok = program.addShaderFromSourceFile(QGLShader::Fragment, ":/fshader.glsl");
bool lok = program.link ();
assert(lok && vok && fok);
bool success = program.bind();
assert(success);
}
///--- Create vertex buffer/attributes "position"
{
auto vpoints = mesh.get_vertex_property<Vec3>("v:point");
bool success = vertexbuffer.create();
assert(success);
vertexbuffer.setUsagePattern( QGLBuffer::StaticDraw );
success = vertexbuffer.bind();
assert(success);
vertexbuffer.allocate( vpoints.data(), sizeof(Vec3) * mesh.n_vertices() );
program.setAttributeBuffer("vpoint", GL_FLOAT, 0, 3 );
program.enableAttributeArray("vpoint");
}
///--- Create vertex buffer/attributes "normal"
{
auto vnormal = mesh.get_vertex_property<Vec3>("v:normal");
bool success = normalbuffer.create();
assert(success);
normalbuffer.setUsagePattern( QGLBuffer::StaticDraw );
success = normalbuffer.bind();
assert(success);
normalbuffer.allocate( vnormal.data(), sizeof(Vec3) * mesh.n_vertices() );
program.setAttributeBuffer("vnormal", GL_FLOAT, 0, 3 );
program.enableAttributeArray("vnormal");
}
///--- Create the index "triangle" buffer
{
bool success = indexbuffer.create();
assert(success);
indexbuffer.setUsagePattern( QGLBuffer::StaticDraw );
success = indexbuffer.bind();
assert(success);
indexbuffer.allocate(&triangles[0], triangles.size()*sizeof(unsigned int));
}
#ifdef WITH_QGLVIEWER
///--- Setup camera
{
Box3 bbox = OpenGP::bounding_box(mesh);
camera()->setType(qglviewer::Camera::ORTHOGRAPHIC);
camera()->setSceneCenter(qglviewer::tr(bbox.center()));
camera()->setSceneRadius(bbox.diagonal().norm()/2.0);
camera()->showEntireScene();
}
#endif
///--- Unbind to avoid pollution
vao.release();
program.release();
}
void GLWidget::drawPoint(const Vector& pos, float r, float g, float b)
{
static bool created = false;
static QGLShaderProgram program;
static GLuint VAO;
if (!created)
{
created = true;
// 1. Create shaders
QGLShader vs(QGLShader::Vertex);
vs.compileSourceCode("#version 330 core \n in vec3 vertex; in vec3 color; uniform mat4 modelViewProjectionMatrix; out vec4 frontColor; void main() { frontColor = vec4(color,1); gl_Position = modelViewProjectionMatrix * vec4(vertex, 1.0); }");
QGLShader fs(QGLShader::Fragment);
fs.compileSourceCode("#version 330 core \n in vec4 frontColor; out vec4 FragColor; void main() {FragColor = frontColor;}");
program.addShader(&vs);
program.addShader(&fs);
program.link();
// Get location of VS attributes
GLuint vertexLoc = program.attributeLocation("vertex");
GLuint colorLoc = program.attributeLocation("color");
// 2. Create VBO Buffers
// Create & bind empty VAO
glGenVertexArrays(1, &VAO);
glBindVertexArray(VAO);
// Create VBO with (x,y,z) coordinates
float coords[] = { 0, 0, 0};
GLuint VBO_coords;
glGenBuffers(1, &VBO_coords);
glBindBuffer(GL_ARRAY_BUFFER, VBO_coords);
glBufferData(GL_ARRAY_BUFFER, sizeof(coords), coords, GL_STATIC_DRAW);
glVertexAttribPointer(vertexLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(vertexLoc);
// Create VBO with (r,g,b) color
float colors[] = {r, g, b};
GLuint VBO_colors;
glGenBuffers(1, &VBO_colors);
glBindBuffer(GL_ARRAY_BUFFER, VBO_colors);
glBufferData(GL_ARRAY_BUFFER, sizeof(colors), colors, GL_STATIC_DRAW);
glVertexAttribPointer(colorLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(colorLoc);
glBindVertexArray(0);
}
program.bind();
// 1. Define uniforms
QMatrix4x4 T;
T.translate(pos);
QMatrix4x4 MVP = camera()->projectionMatrix() * camera()->modelviewMatrix()*T;
program.setUniformValue("modelViewProjectionMatrix", MVP);
// 2. Draw
glPointSize(8);
glBindVertexArray (VAO);
glDrawArrays(GL_POINTS, 0, 1);
glBindVertexArray(0);
program.release();
}
void GLWidget::drawAxes()
{
float L = 1;
static bool created = false;
static QGLShaderProgram program;
static GLuint VAO_axes;
if (!created)
{
created = true;
// 1. Create shaders
// VS
QGLShader vs(QGLShader::Vertex);
vs.compileSourceCode("#version 330 core \n in vec3 vertex; in vec3 color; uniform mat4 modelViewProjectionMatrix; out vec4 frontColor; void main() { frontColor = vec4(color,1); gl_Position = modelViewProjectionMatrix * vec4(vertex, 1.0); }");
// FS
QGLShader fs(QGLShader::Fragment);
fs.compileSourceCode("#version 330 core \n in vec4 frontColor; out vec4 FragColor; void main() {FragColor = frontColor;}");
// Program
program.addShader(&vs);
program.addShader(&fs);
program.link();
// Get location of VS attributes
GLuint vertexLoc = program.attributeLocation("vertex");
GLuint colorLoc = program.attributeLocation("color");
// 2. Create VBO Buffers
// Create & bind empty VAO
glGenVertexArrays(1, &VAO_axes);
glBindVertexArray(VAO_axes);
// Create VBO with (x,y,z) coordinates
float coords[] = { 0, 0, 0,
L, 0, 0,
0, 0, 0,
0, L, 0,
0, 0, 0,
0, 0, L};
GLuint VBO_coords;
glGenBuffers(1, &VBO_coords);
glBindBuffer(GL_ARRAY_BUFFER, VBO_coords);
glBufferData(GL_ARRAY_BUFFER, sizeof(coords), coords, GL_STATIC_DRAW);
glVertexAttribPointer(vertexLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(vertexLoc);
// Create VBO with (r,g,b) color
float colors[] = {1, 0, 0, 1, 0, 0,
0, 1, 0, 0, 1, 0,
0, 0, 1, 0, 0, 1};
GLuint VBO_colors;
glGenBuffers(1, &VBO_colors);
glBindBuffer(GL_ARRAY_BUFFER, VBO_colors);
glBufferData(GL_ARRAY_BUFFER, sizeof(colors), colors, GL_STATIC_DRAW);
glVertexAttribPointer(colorLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
glEnableVertexAttribArray(colorLoc);
glBindVertexArray(0);
}
program.bind();
// 1. Define uniforms
float r = max(MIN_AXES_LENGTH, scene()->boundingBox().radius());
QMatrix4x4 scale;
scale.scale(r,r,r);
QMatrix4x4 MVP = camera()->projectionMatrix() * camera()->modelviewMatrix()*scale;
program.setUniformValue("modelViewProjectionMatrix", MVP);
// 2. Draw
glBindVertexArray (VAO_axes);
glDrawArrays(GL_LINES, 0, 6);
glBindVertexArray(0);
program.release();
// 5. CleanUp
/*
glDeleteVertexArrays(1, &VAO_axes);
glDeleteBuffers(1, &VBO_coords);
glDeleteBuffers(1, &VBO_colors);
*/
/*
glDisable(GL_LIGHTING);
glBegin(GL_LINES);
glColor3f(1,0,0); glVertex3f(0,0,0); glVertex3f(L,0,0); // X
glColor3f(0,1,0); glVertex3f(0,0,0); glVertex3f(0,L,0); // Y
glColor3f(0,0,1); glVertex3f(0,0,0); glVertex3f(0,0,L); // Z
glEnd();
glEnable(GL_LIGHTING);
*/
}
void PerspectiveView::glPass(GLResourceContext &ctx)
{
glEnable(GL_DEPTH_TEST);
QMatrix4x4 cameraProjM = _camera->getProjMatrix(width(), height());
QMatrix4x4 cameraViewM = _camera->getViewMatrix(width(), height());
QMatrix4x4 cameraProjViewM = cameraProjM * cameraViewM;
QMatrix4x4 objToWorld;
Scene* scene = Scene::activeScene();
// render each mesh
QHashIterator<QString,Mesh*> meshes = scene->meshes();
while (meshes.hasNext()) {
meshes.next();
Mesh* mesh = meshes.value();
// make sure a texture exists for this mesh
if (!hasMeshTexture(mesh)) {
std::cout << "creating mesh texture" << std::endl;
QOpenGLFramebufferObject* transferFbo = ctx.transferFbo();
transferFbo->bind();
GLuint textureId;
glGenTextures(1, &textureId);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, textureId);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glClearColor(.5,.5,.5,1);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0,1,0,1,-1,1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glViewport(0, 0, 256, 256);
glColor3f(.8,.8,.8);
glBegin(GL_QUADS);
{
glVertex2f(.25,.25);
glVertex2f(.75,.25);
glVertex2f(.75,.75);
glVertex2f(.25,.75);
}
glEnd();
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, 256, 256, 0);
transferFbo->release();
//glActiveTexture(GL_TEXTURE0);
//QImage img("/tmp/lena.jpg");
//QImage image = QGLWidget::convertToGLFormat(img);
//glTexSubImage2D(GL_TEXTURE_2D, 0, 0,0 , image.width(), image.height(), GL_RGB, GL_UNSIGNED_BYTE, image.bits() );
glViewport(0, 0, width(), height());
setMeshTexture(mesh, textureId);
}
QOpenGLFramebufferObject* paintFbo = ctx.paintFbo();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, meshTexture(mesh));
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, paintFbo->texture());
glActiveTexture(GL_TEXTURE0);
QGLShaderProgram* meshShader = ctx.meshShader();
meshShader->bind();
meshShader->setUniformValue("objToWorld", objToWorld);
meshShader->setUniformValue("cameraPV", cameraProjViewM);
meshShader->setUniformValue("paintFboWidth", PAINT_FBO_WIDTH);
meshShader->setUniformValue("brushColor", _brushColor.redF(), _brushColor.greenF(), _brushColor.blueF(), 1);
meshShader->setUniformValue("meshTexture", 0);
meshShader->setUniformValue("paintTexture", 1);
renderMesh(mesh);
meshShader->release();
}
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glLoadMatrixf(cameraProjM.data());
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glLoadMatrixf(cameraViewM.data());
glBegin(GL_LINES);
for (int i = -10; i <= 10; i++) {
glVertex3f(-10, 0, i);
glVertex3f(10, 0, i);
}
glEnd();
glDisable(GL_DEPTH_TEST);
drawPaintStrokes(ctx);
if (_bakePaintLayer) {
bakePaintLayer(ctx);
}
}