add camera movements (on sphere around zero point)

src/Audio/AudioPlayer.cpp

@@ -88,7 +88,7 @@ int AudioPlayer::streamCallback(const void* input,
 	_sndSource->readData(framesPerBuffer, output);
 
 	if(_streamListener) {
-		_streamListener(output, framesPerBuffer);
+		_streamListener((float*)output, framesPerBuffer);
 	}
 
 	return paContinue;
@@ -110,7 +110,7 @@ void AudioPlayer::stop() {
 	PA_CHECK_ERROR(err);
 }
 
-void AudioPlayer::setStreamListener(std::function<void(void*,std::size_t)> callback) {
+void AudioPlayer::setStreamListener(std::function<void(float*,std::size_t)> callback) {
 	_streamListener = callback;
 }
 

src/Audio/AudioPlayer.h

@@ -10,7 +10,7 @@ class AudioPlayer {
 private:
 	ISndSource* _sndSource;
 	PaStream* _stream;
-	std::function<void(void*,std::size_t)> _streamListener;
+	std::function<void(float*,std::size_t)> _streamListener;
 	std::function<void()> _streamFinishedLitener;
 
 public:
@@ -18,7 +18,7 @@ public:
 	~AudioPlayer();
 	void play();
 	void stop();
-	void setStreamListener(std::function<void(void*,std::size_t)> callback);
+	void setStreamListener(std::function<void(float*,std::size_t)> callback);
 	void setStreamFinishedListener(std::function<void()> callback);
 	int streamCallback(const void* input,
 	                   void* output,

src/Camera.cpp

@@ -1,6 +1,7 @@
 #include "Camera.h"
 #include "OGL.h"
 #include <glm/gtx/rotate_vector.hpp>
+#include <glm/gtx/quaternion.hpp>
 
 Camera::Camera() {
 	_viewDistance = 4.0f;
@@ -8,7 +9,7 @@ Camera::Camera() {
 	_at = glm::vec3(0.0f, 0.0f, 0.0f);
 	_up = glm::vec3(0.0f, 1.0f, 0.0f);
     _view = glm::lookAt(_eye, _at, _up);
-    _projection = glm::perspective(45.0f, 1.0f, -2.0f, 2.0f);
+    _projection = glm::perspective(45.0f, 1.0f, 2.0f, -2.0f);
 }
 
 void Camera::init() {
@@ -32,25 +33,58 @@ void Camera::updateView() {
 }
 
 void Camera::turnLeft(float angle) {
-	_up = glm::rotateY(_up, angle);
-	_eye = glm::rotateY(_eye, angle);
+	glm::quat q = glm::angleAxis(angle, _up);
+	_eye = glm::rotate(q, _eye);
 	updateView();
 }
 
 void Camera::turnRight(float angle) {
-	_up = glm::rotateY(_up, -angle);
-	_eye = glm::rotateY(_eye, -angle);
+	glm::quat q = glm::angleAxis(-angle, _up);
+	_eye = glm::rotate(q, _eye);
 	updateView();
 }
 
 void Camera::turnUp(float angle) {
-	_up = glm::rotateX(_up, angle);
-	_eye = glm::rotateX(_eye, angle);
+	glm::vec3 axis = glm::normalize(glm::cross(_up, _eye));
+	glm::quat q = glm::angleAxis(angle, axis);
+	_eye = glm::rotate(q, _eye);
+	_up = glm::normalize(glm::cross(_eye, axis));
 	updateView();
 }
 
 void Camera::turnDown(float angle) {
-	_up = glm::rotateX(_up, -angle);
-	_eye = glm::rotateX(_eye, -angle);
+	glm::vec3 axis = glm::normalize(glm::cross(_up, _eye));
+	glm::quat q = glm::angleAxis(-angle, axis);
+	_eye = glm::rotate(q, _eye);
+	_up = glm::normalize(glm::cross(_eye, axis));
 	updateView();
 }
+
+void Camera::rotateCW(float angle) {
+	glm::quat q = glm::angleAxis(-angle, glm::normalize(_eye));
+	_up = glm::rotate(q, _up);
+	updateView();
+}
+
+void Camera::rotateCCW(float angle) {
+	glm::quat q = glm::angleAxis(angle, glm::normalize(_eye));
+	_up = glm::rotate(q, _up);
+	updateView();
+}
+
+void Camera::moveToCenter(float distance) {
+	_eye -= distance*glm::normalize(_eye);
+	updateView();
+}
+
+void Camera::moveFromCenter(float distance) {
+	_eye += distance*glm::normalize(_eye);
+	updateView();
+}
+
+void Camera::moveForward(float distance) {
+}
+
+void Camera::moveBackward(float distance) {
+
+}

src/Camera.h

@@ -24,6 +24,13 @@ public:
 	void turnRight(float angle);
 	void turnUp(float angle);
 	void turnDown(float angle);
+	void rotateCW(float angle);
+	void rotateCCW(float angle);
+	void moveToCenter(float distance);
+	void moveFromCenter(float distance);
+
+	void moveForward(float distance);
+	void moveBackward(float distance);
 };
 
 

src/GLObjects/SpectralMesh.cpp

@@ -1,7 +1,6 @@
 #include "SpectralMesh.h"
-#include <string.h>
 #include <iostream>
-#include <cmath>
+#include <cfloat>
 
 SpectralMesh::SpectralMesh(ShaderProgram *shader, std::size_t size): Mesh(shader, size) {
 	_data = new float[size*size];
@@ -30,7 +29,7 @@ void SpectralMesh::addLine(float *line) {
 
 	for(std::size_t i = 0; i < _size; ++i) {
 		float real = _spectrLineComplex[i][0], imag = _spectrLineComplex[i][1];
-		_spectrLine[i] = 0.3*log10f(sqrtf(real*real + imag*imag)) + 0.1f;
+		_spectrLine[i] = 0.3f*log10f(sqrtf(real*real + imag*imag)) + 0.1f;
 		if(_spectrLine[i] < 0) {
 			_spectrLine[i] = 0;
 		}
@@ -41,3 +40,22 @@ void SpectralMesh::addLine(float *line) {
 
 	fftwf_destroy_plan(plan);
 }
+
+void SpectralMesh::normalizeArray(float *array, std::size_t size) {
+	float min = FLT_MAX, max = 0.0f;
+
+	// calc min and max elements
+	for(std::size_t i = 0; i < size; ++i) {
+		float cur = array[i];
+		if(cur < min)
+			min = cur;
+
+		if(cur > max)
+			max = cur;
+	}
+
+    // actual normalization
+    for(std::size_t i = 0; i < size; ++i) {
+        array[i] = (array[i] - min)/(max - min);
+    }
+}

src/GLObjects/SpectralMesh.h

@@ -18,6 +18,7 @@ public:
 
 private:
 	float heightMapFunc(std::size_t nx, std::size_t ny, float fx, float fy) const override final;
+	void normalizeArray(float* array, std::size_t size);
 };
 
 

src/OGL.cpp

@@ -8,6 +8,7 @@ bool wiredFlag = false;
 void keyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
 {
 	const float turnStep = 0.1f;  // in radians
+	const float moveStep = 0.1f;
 
 	if (key == GLFW_KEY_M && action == GLFW_PRESS) {
 		glPolygonMode(GL_FRONT_AND_BACK, wiredFlag ? GL_FILL : GL_LINE);
@@ -28,6 +29,18 @@ void keyCallback(GLFWwindow* window, int key, int scancode, int action, int mods
 			case GLFW_KEY_DOWN:
 				Camera::instance()->turnDown(turnStep);
 				break;
+			case GLFW_KEY_PAGE_UP:
+				Camera::instance()->rotateCW(turnStep);
+				break;
+			case GLFW_KEY_PAGE_DOWN:
+				Camera::instance()->rotateCCW(turnStep);
+				break;
+			case GLFW_KEY_W:
+				Camera::instance()->moveToCenter(moveStep);
+				break;
+			case GLFW_KEY_S:
+				Camera::instance()->moveFromCenter(moveStep);
+				break;
 		}
 	}
 }
@@ -80,6 +93,10 @@ void OGL::init() {
 		std::string errMsg = std::string("GLEW init error: ") + (char*)glewGetErrorString(err);
 		throw new std::runtime_error(errMsg);
 	}
+
+	glEnable(GL_DEPTH_TEST);
+	glClearDepth(1.0);
+	glDepthFunc(GL_LEQUAL);
 }
 
 void OGL::run() {

src/main.cpp

@@ -1,35 +1,32 @@
 #include "Shaders/ShaderProgram.h"
-#include "GLObjects/WaveMesh.h"
 #include "Audio/AudioPlayer.h"
 #include "GLObjects/SpectralMesh.h"
 #include "OGL.h"
 #include "Camera.h"
 
 #include <iostream>
-#include <fstream>
-#include <sstream>
 
 int main() {
-	OGL::instance()->init();
+	try {
+		OGL::instance()->init();
 
-	ShaderProgram program("../shaders/vertex.glsl", "../shaders/fragment.glsl");
-	OGL::instance()->setCurShaderProgram(&program);
+		ShaderProgram program("../shaders/vertex.glsl", "../shaders/fragment.glsl");
+		OGL::instance()->setCurShaderProgram(&program);
 
-	SpectralMesh mesh(&program, 256);
-	mesh.create();
-	OGL::instance()->addObject(&mesh);
+		SpectralMesh mesh(&program, 256);
+		mesh.create();
+		OGL::instance()->addObject(&mesh);
 
-	Camera::instance()->init();
+		Camera::instance()->init();
 
-//	glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
-	glDepthFunc(GL_LEQUAL);
-	glEnable(GL_DEPTH_TEST);
+		AudioPlayer player("/Users/selim/Dropbox/euphoria.wav" /*"/home/selim/dl/euphoria.wav"*/);
+		player.setStreamListener([&mesh](float *data, std::size_t framesCount) {
+			mesh.addLine(data);
+		});
+		player.play();
 
-	AudioPlayer player("/home/selim/dl/euphoria.wav");
-	player.setStreamListener([&mesh](void* data, std::size_t framesCount){
-		mesh.addLine((float*)data);
-	});
-	player.play();
-
-	OGL::instance()->run();
+		OGL::instance()->run();
+	} catch (std::exception& ex) {
+		std::cout << "exception: " << ex.what() << std::endl;
+	}
 }