int main()
{
InitGlfw initGlfw;
ShaderLoader shaderLoader;
TextureLoader textureLoader;
TextRenderer textRenderer;
// Init
initGlfw.Init();
textRenderer.Init();
glfwSetKeyCallback(initGlfw.window, KeyCallback);
glfwSetMouseButtonCallback(initGlfw.window, MouseButtonCallback);
glfwSetCursorPosCallback(initGlfw.window, MouseMoveCallback);
// Shader loading
GLuint defaultShaderProgram;
GLuint textShaderProgram;
GLuint simpleShaderProgram;
defaultShaderProgram = shaderLoader.CreateProgram("Shaders\\vertex_shader.glsl", "Shaders\\fragment_shader.glsl");
textShaderProgram = shaderLoader.CreateProgram("Shaders\\text_vs.glsl", "Shaders\\text_fs.glsl");
simpleShaderProgram = shaderLoader.CreateProgram("Shaders\\simple_vertex_shader.glsl", "Shaders\\simple_fragment_shader.glsl");
// Load texture
GLuint texture = textureLoader.LoadRGB("Images\\container.jpg");
GLuint blankTexture = textureLoader.LoadBlank();
cout << "Blank texture status: " << blankTexture << endl;
// Define camera component vectors
float wallDistanceMargin = 0.2f;
float currentX;
float currentZ;
glm::vec3 cameraPos = glm::vec3(0.0f, -0.5f, 6.0f);
glm::vec3 cameraFront = glm::vec3(0.0f, 0.0f, -1.0f);
glm::vec3 cameraUp = glm::vec3(0.0f, 1.0f, 0.0f);
float yaw = -90.0f;
glm::vec3 front(cos(glm::radians(yaw)), 0.0f, sin(glm::radians(yaw)));
// Define model and view matrices and get shader locations
GLuint modelLocation = glGetUniformLocation(defaultShaderProgram, "model");
GLuint viewLocation = glGetUniformLocation(defaultShaderProgram, "view");
GLuint projectionLocation = glGetUniformLocation(defaultShaderProgram, "projection");
double currentTime = glfwGetTime();
double delta;
glm::mat4 view;
glm::mat4 proj1;
glm::mat4 idm = glm::mat4();
// Hard-coded virtual environment
Square backWall;
Square leftWall;
Square rightWall;
Square floorSquare;
Square frontWall;
Square rewardZone;
float corridorDepth = 10.0f;
float corridorWidth = 3.0f;
float wallHeight = 2.0f;
float rewardZoneDepth = 2.0f;
float rewardZonePosition = -3.0f;
float rewardZoneLowZ = rewardZonePosition - rewardZoneDepth;
float rewardZoneHighZ = rewardZonePosition + rewardZoneDepth;
bool inRewardZone = false;
backWall.SetColor(0.5f, 0.5f, 0.9f);
backWall.SetScaling(corridorWidth, wallHeight);
backWall.SetPosition(0.0f, wallHeight/2, -corridorDepth);
frontWall.SetColor(0.5f, 0.5f, 0.9f);
frontWall.SetScaling(corridorWidth, wallHeight);
frontWall.SetPosition(0.0f, wallHeight / 2.0f, corridorDepth);
leftWall.SetColor(0.5f, 0.9f, 0.5f);
leftWall.SetScaling(corridorDepth, wallHeight);
leftWall.SetRotation(0.0f, 90.0f, 0.0f);
leftWall.SetPosition(-corridorWidth, wallHeight/2, 0.0f);
rightWall.SetColor(0.5f, 0.9f, 0.5f);
rightWall.SetScaling(corridorDepth, wallHeight);
rightWall.SetRotation(0.0f, 90.0f, 0.0f);
rightWall.SetPosition(corridorWidth,wallHeight/2, 0.0f);
floorSquare.SetColor(0.1f, 0.1f, 0.1f);
floorSquare.SetScaling(corridorWidth, corridorDepth);
floorSquare.SetRotation(-90.0f, 0.0f, 0.0f);
floorSquare.SetPosition(0.0f, -wallHeight/2.0f, 0.0f);
rewardZone.SetColor(0.2f, 0.9f, 0.2f);
rewardZone.SetScaling(corridorWidth, rewardZoneDepth);
rewardZone.SetRotation(-90.0f, 0.0f, 0.0f);
rewardZone.SetPosition(0.0f, -wallHeight / 2.0f + 0.01f, rewardZonePosition);
proj1 = glm::perspective(45.0f, (float)2.0f*initGlfw.windowInfo.width / initGlfw.windowInfo.height, 0.1f, 100.0f);
glEnable(GL_DEPTH_TEST);
// Create frame buffer for offscreen rendering, configured to draw to a texture buffer from which we sample
// to draw on each window.
GLuint frameBufferObject;
GLuint frameBufferTexture;
GLuint renderBufferObject;
int fullWidth = 2*initGlfw.windowInfo.width;
glGenTextures(1, &frameBufferTexture);
glBindTexture(GL_TEXTURE_2D, frameBufferTexture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, fullWidth, initGlfw.windowInfo.height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_2D, 0);
glGenRenderbuffers(1, &renderBufferObject);
glBindRenderbuffer(GL_RENDERBUFFER, renderBufferObject);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, fullWidth, initGlfw.windowInfo.height);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glGenFramebuffers(1, &frameBufferObject);
glBindFramebuffer(GL_FRAMEBUFFER, frameBufferObject);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, frameBufferTexture, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, renderBufferObject);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE)
cout << "Framebuffer completed" << endl;
// Generate quads for left and right window
GLfloat leftScreenVertices[] = {
// Positions // TexCoords
-1.0f, 1.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 0.0f, 0.0f,
1.0f, -1.0f, 0.5f, 0.0f,
-1.0f, 1.0f, 0.0f, 1.0f,
1.0f, -1.0f, 0.5f, 0.0f,
1.0f, 1.0f, 0.5f, 1.0f
};
GLfloat rightScreenVertices[] = {
// Positions // TexCoords
-1.0f, 1.0f, 0.5f, 1.0f,
-1.0f, -1.0f, 0.5f, 0.0f,
1.0f, -1.0f, 1.0f, 0.0f,
-1.0f, 1.0f, 0.5f, 1.0f,
1.0f, -1.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 1.0f
};
GLuint leftScreenVBO;
GLuint rightScreenVBO;
glGenBuffers(1, &leftScreenVBO);
glBindBuffer(GL_ARRAY_BUFFER, leftScreenVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(leftScreenVertices), leftScreenVertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &rightScreenVBO);
glBindBuffer(GL_ARRAY_BUFFER, rightScreenVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(rightScreenVertices), rightScreenVertices, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
// Game loop
int updateTick = 0;
while (!glfwWindowShouldClose(initGlfw.window))
{
// Get time
delta = glfwGetTime() - currentTime;
currentTime = glfwGetTime();
std::string fpsString = "FPS: " + std::to_string(delta);
// Update view matrix
// sensor readings need to be plugged in here
front = glm::vec3(cos(glm::radians(yaw)), 0.0f, sin(glm::radians(yaw)));
currentX = cameraPos.x;
currentZ = cameraPos.z;
cameraPos += yVelocity * front;
cameraPos -= glm::normalize(glm::cross(cameraFront, cameraUp)) * xVelocity;
// Collision detection, reset to previous position if wall boundary is crossed
if ( (cameraPos.x-wallDistanceMargin) < -corridorWidth | (cameraPos.x + wallDistanceMargin)> corridorWidth)
cameraPos.x = currentX;
if ((cameraPos.z-wallDistanceMargin) < -corridorDepth | (cameraPos.z + wallDistanceMargin) > corridorDepth)
cameraPos.z = currentZ;
// Check reward zone entries
if (!inRewardZone && (cameraPos.z > rewardZoneLowZ && cameraPos.z < rewardZoneHighZ))
{
inRewardZone = true;
cout << "Reward zone ENTRY detected." << endl;
}
if (inRewardZone && (cameraPos.z < rewardZoneLowZ || cameraPos.z > rewardZoneHighZ))
{
inRewardZone = false;
cout << "Reward zone EXIT detected." << endl;
}
view = glm::lookAt(cameraPos, cameraPos + cameraFront, cameraUp);
// Draw the complete screen to the offscreen framebuffer
glfwMakeContextCurrent(initGlfw.window);
glBindFramebuffer(GL_FRAMEBUFFER, frameBufferObject);
glViewport(0, 0, fullWidth, initGlfw.windowInfo.height);
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
if (showFPS)
textRenderer.RenderText(textShaderProgram, fpsString, 0.0f, GLfloat(initGlfw.windowInfo.height - 20), 1.0, glm::vec3(0.8, 0.6, 0.6));
glUseProgram(defaultShaderProgram);
glUniformMatrix4fv(viewLocation, 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(projectionLocation, 1, GL_FALSE, glm::value_ptr(proj1));
glUniformMatrix4fv(modelLocation, 1, GL_FALSE, glm::value_ptr(idm));
glBindTexture(GL_TEXTURE_2D, texture);
frontWall.Draw();
backWall.Draw();
leftWall.Draw();
rightWall.Draw();
floorSquare.Draw();
glBindTexture(GL_TEXTURE_2D, blankTexture);
rewardZone.Draw();
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// First monitor drawing calls
//glfwMakeContextCurrent(initGlfw.window);
glClear(GL_COLOR_BUFFER_BIT);
glDisable(GL_DEPTH_TEST);
glViewport(0, 0, initGlfw.windowInfo.width, initGlfw.windowInfo.height);
glUseProgram(simpleShaderProgram);
glBindTexture(GL_TEXTURE_2D, frameBufferTexture);
glBindBuffer(GL_ARRAY_BUFFER, rightScreenVBO);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), (GLvoid*)0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), (GLvoid*)(2 * sizeof(GLfloat)));
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glDrawArrays(GL_TRIANGLES, 0, 6);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glfwSwapBuffers(initGlfw.window);
// Second monitor drawing calls
glfwMakeContextCurrent(initGlfw.window2);
glClear(GL_COLOR_BUFFER_BIT);
glDisable(GL_DEPTH_TEST);
glUseProgram(simpleShaderProgram);
glBindTexture(GL_TEXTURE_2D, frameBufferTexture);
glBindBuffer(GL_ARRAY_BUFFER, leftScreenVBO);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), (GLvoid*)0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), (GLvoid*)(2 * sizeof(GLfloat)));
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glDrawArrays(GL_TRIANGLES, 0, 6);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glfwSwapBuffers(initGlfw.window2);
// Check events
glfwPollEvents();
// Output information
++updateTick;
if (updateTick % 60 == 0)
{
cout << "Camera position: (" << cameraPos.x << ", " << cameraPos.y << ", " << cameraPos.z << ")" << endl;
updateTick = 0;
}
}
glfwTerminate();
// Clean up after exiting
glDeleteFramebuffers(1, &frameBufferObject);
return 0;
}
