Adding picking code.

Notes: once more shaders are created, switch between them for picking
instead of applying colors and trying to juggle that shit.

mainwindow.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>588</width>
+    <width>649</width>
-    <height>499</height>
+    <height>560</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -15,7 +15,7 @@
   </property>
   <widget class="QWidget" name="centralWidget">
    <layout class="QHBoxLayout" name="horizontalLayout">
-    <item>
+    <item alignment="Qt::AlignLeft|Qt::AlignTop">
      <widget class="QFrame" name="frame">
       <property name="sizePolicy">
        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
@@ -29,12 +29,6 @@
         <height>500</height>
        </size>
       </property>
-      <property name="maximumSize">
-       <size>
-        <width>500</width>
-        <height>500</height>
-       </size>
-      </property>
       <property name="frameShape">
        <enum>QFrame::StyledPanel</enum>
       </property>
@@ -45,6 +39,9 @@
     </item>
     <item>
      <layout class="QGridLayout" name="gridLayout">
+      <property name="horizontalSpacing">
+       <number>6</number>
+      </property>
       <item row="0" column="0">
        <widget class="QLabel" name="label">
         <property name="text">
@@ -131,7 +128,7 @@
     <rect>
      <x>0</x>
      <y>0</y>
-     <width>588</width>
+     <width>649</width>
      <height>20</height>
     </rect>
    </property>

src/viewer/simpleViewer.cpp

@@ -100,86 +100,20 @@ void Viewer::draw()
 	// Traverse the Scene in order to draw its components
 
 	modelStack.push(modelViewMatrix);
-    //root.accept(*this);
+	root.accept(*this);
+	update();
 }
 
 void Viewer::mouseMoveEvent(QMouseEvent* e) {
-	cout << "Viewer::mouseMoveEvent(QMouseEvent* e)" << endl;
+	//cout << "Viewer::mouseMoveEvent(QMouseEvent* e)" << endl;
 	// Normal QGLViewer behavior.
 	//QGLViewer::mouseMoveEvent(e);
 }
 
 void Viewer::mousePressEvent(QMouseEvent* e) {
     // Auto Return, but old code left in as reference
-    return;
+	//std::cout << "Picking shape at " << e->pos().x() << ", " << e->pos().y() << endl;
-
+	Shape* selectedShape = pickGeom(e->pos().x()+20, e->pos().y()+20);
-	cout << "Viewer::mouseMoveEvent(QMouseEvent* e) : " << e->button() << endl;
-
-	if(e->button() == 1){ // LMB
-
-		int truY = 10 - (e->y()) / 500.0 * GRID_SIZE;
-		int truX = (e->x() / 500.0) * GRID_SIZE;
-
-		cout << " -->Getting cell at " << truX << " : " << truY << endl;
-
-		SceneGroup* row = dynamic_cast<SceneGroup*> (root.childAt(truY));
-		cout << " -->" << row << endl;
-		SceneGroup* cell = dynamic_cast<SceneGroup*> (row->childAt(truX));
-		cout << " -->" << cell << endl;
-
-		if(e->modifiers() & Qt::ShiftModifier){
-			// add a shape
-			if(!cell->getChildren()->size()){
-
-				// WARNING: CODE DEGEULASSE
-
-				Shape* s = nullptr;
-				if(activeShape == 1){
-					s = new Triangle();
-				}else if(activeShape == 2){
-					s = new Square();
-				}else if(activeShape == 3){
-					s = new Circle();
-				}
-
-				// WARNING: END OF CODE DEGEULASSE
-
-				//activeCell->getChildren()->at(0) = s;
-				if(s != nullptr){
-					s->setColor(*activeColor);
-					cell->addChild(s);
-					this->update();
-					deselect();
-					activeCell = cell;
-				}
-			}
-		}
-
-		if(e->modifiers() & Qt::ControlModifier){
-			// select a shape
-			deselect();
-			activeCell = cell;
-			if(activeCell != nullptr && activeCell->getChildren()->size()){
-				std::cout << "Cell has children..." << endl;
-				Shape* shape = dynamic_cast<Shape*> (activeCell->childAt(0));
-				QColor newColor = shape->getColor();
-				std::cout << newColor.Rgb << endl;
-				newColor.setAlpha(255);
-				shape->setColor(newColor);
-				//emit shapeSelected(getTypeIndex(typeof activeCell->childAt(0)));
-				int shapeId = 0;
-				if(typeid(*(activeCell->getChildren()->at(0))) == typeid(Triangle))
-					shapeId = 1;
-				if(typeid(*(activeCell->getChildren()->at(0))) == typeid(Square))
-					shapeId = 2;
-				if(typeid(*(activeCell->getChildren()->at(0))) == typeid(Circle))
-					shapeId = 3;
-				emit shapeSelected(shapeId);
-			}else{
-				emit shapeSelected(0);
-			}
-		}
-	}
 }
 
 void Viewer::deselect(){
@@ -198,7 +132,7 @@ void Viewer::deselect(){
 }
 
 void Viewer::mouseReleaseEvent(QMouseEvent* e) {
-	cout << "Viewer::mouseReleaseEvent(QMouseEvent* e)" << endl;
+	//cout << "Viewer::mouseReleaseEvent(QMouseEvent* e)" << endl;
 	//QGLViewer::mouseReleaseEvent(e);
 }
 
@@ -224,12 +158,21 @@ void Viewer::init()
 	initShaders();
     initGeometries();
     //initGrid();
+
+	/*QColor* color = new QColor(255, 128, 0, 255);
+	Circle* c = new Circle;
+	c->setColor(*color);
+	SceneGroup* cell = new SceneGroup;
+	cell->addChild(c);
+	root.addChild(cell);*/
+	//update();
 }
 
 void Viewer::initShaders()
 {
 	// Load vertex and fragment shaders
 	m_program = new QOpenGLShaderProgram;
+	colorPickerShaderProgram = m_program;
 	if (!m_program->addShaderFromSourceFile(QOpenGLShader::Vertex, "src/shaders/basicShader.vert")) {
 		cerr << "Unable to load Shader" << endl
 			 << "Log file:" << endl;
@@ -256,6 +199,34 @@ void Viewer::initShaders()
 
 	if ((m_projMatrixLocation = m_program->uniformLocation("projMatrix")) < 0)
 		qDebug() << "Unable to find shader location for " << "projMatrix";
+
+
+	/*
+	 * Adding Texture Shader
+	 *
+	 */
+	textureRenderShaderprogram = new QOpenGLShaderProgram;
+	if (!textureRenderShaderprogram->addShaderFromSourceFile(QOpenGLShader::Vertex, "src/shaders/textureShader.vert")) {
+		cerr << "Unable to load Shader" << endl
+			 << "Log file:" << endl;
+		qDebug() << textureRenderShaderprogram->log();
+	}
+	if (!textureRenderShaderprogram->addShaderFromSourceFile(QOpenGLShader::Fragment, "src/shaders/textureShader.frag")) {
+		cerr << "Unable to load Shader" << endl
+			 << "Log file:" << endl;
+		qDebug() << textureRenderShaderprogram->log();
+	}
+
+	textureRenderShaderprogram->link();
+
+	if ((m_vPositionLocation = m_program->attributeLocation("vPosition")) < 0)
+		qDebug() << "Unable to find shader location for " << "vPosition";
+
+	if ((m_mvMatrixLocation = m_program->uniformLocation("mvMatrix")) < 0)
+		qDebug() << "Unable to find shader location for " << "mvMatrix";
+
+	if ((m_projMatrixLocation = m_program->uniformLocation("projMatrix")) < 0)
+		qDebug() << "Unable to find shader location for " << "projMatrix";
 }
 
 // Creates the basic shapes in memory. We only have 3, so we just prep them all in advance.
@@ -384,3 +355,55 @@ void Viewer::changeColor(QColor c){
 	activeColor = new QColor(c);
 	this->update();
 }
+
+Shape* Viewer::pickGeom(int x, int y){
+	QMap<QRgb, Shape*> mapColorToShape;
+	QColor c;
+	QRgb startColor = 0xFF000033; // alpha must be 100%, glReadPixels doesn't resturn alpha
+	unsigned char pixelData[3];
+	// Traverse tree
+	/* TODO: Make this recurse through SceneGroups, with like "populateMap(map, root, color)"
+	 *       Right now it's fine because we have simple Minecraft rules
+	 *       but could be important in the future
+	 */
+	QOpenGLShaderProgram *lastshader = m_program;
+
+	//colorPickerShaderProgram->bind();
+
+	std::cout << "Iterating through " << root.getChildren()->size() << "items"<<endl;
+
+	for(int i = 0, l = root.getChildren()->size(); i<l; i++)
+	{
+		std::cout << "	iterating... " << i << endl;
+		SceneGroup* current = dynamic_cast<SceneGroup*>(root.childAt(i));
+		Shape* currentCube;
+
+		if(current->getChildren()->size())
+		{
+			currentCube = dynamic_cast<Shape*>(current->childAt(0));
+		}
+
+		if(currentCube)
+		{
+			c.setRgba(startColor);
+			mapColorToShape.insert(c.rgba(), currentCube);
+			std::cout << "Setting " << currentCube << " to " << c.red() << " " << c.green() << " " << c.blue() << " " << c.alpha() << endl;
+			currentCube->setColor(c);
+			startColor++;
+		}
+	}
+	root.accept(*this);
+	update();
+	draw();
+
+	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+	// TODO: figure out how to get this weird offset   ↓↓  frae position maybe?
+	glReadPixels(x, camera()->screenHeight() - 1 - y + 62, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixelData);
+	QColor* pickedColor = new QColor(pixelData[0], pixelData[1], pixelData[2]);
+	Shape* pickedShape = mapColorToShape.value(pickedColor->rgba());
+	std::cout << "Picked Color: " << pickedColor->red() << " " << pickedColor->green() << " " << pickedColor->blue() << " " << pickedColor->alpha() << endl;
+	std::cout << "Picked Shape: " << pickedShape << endl;
+
+	//lastshader->bind();
+	return pickedShape;
+}

src/viewer/simpleViewer.h

@@ -36,7 +36,9 @@
 
 QT_FORWARD_DECLARE_CLASS(QOpenGLShaderProgram)
 
-class Viewer : public QGLViewer, protected QOpenGLFunctions_4_0_Core, public Visitor
+class Viewer : public QGLViewer,
+		protected QOpenGLFunctions_4_0_Core,
+		public Visitor
 {
 Q_OBJECT
 public:
@@ -70,13 +72,18 @@ private:
 	void initShaders();
     void initGeometries();
 	void deselect();
+	Shape* pickGeom(int, int);
 
+	// shader switching variables and constants;
+	QOpenGLShaderProgram *colorPickerShaderProgram;
+	QOpenGLShaderProgram *textureRenderShaderprogram;
 	QOpenGLShaderProgram *m_program;
 	int m_vPositionLocation;
 	int m_colorLocation;
 	int m_projMatrixLocation;
 	int m_mvMatrixLocation;
 
+
 	SceneGroup* activeCell;
 	QColor* activeColor;
 	int activeShape;
@@ -88,6 +95,7 @@ private:
 	GLuint m_Buffers[NumBuffers];
 
 	Shape* generateShapeFromIndex(int);
+
 };
 
 #endif // SIMPLEVIEWER_H