// TODO still broken - needs fixing!
void
Camera::rollRotation(float angleX)
{
// Get our view vector (The direction we are facing)
V3f vView(mView - mEye);
float x = vView.getX();
float y = vView.getY();
float z = vView.getZ();
V3f vNewUp;
// Calculate the sine and cosine of the angle once
float cosTheta = cos(angleX);
float sinTheta = sin(angleX);
// Find the new x position for the new rotated point
*vNewUp.x = ((cosTheta + (1.0f - cosTheta) * x * x) * vView.getX());
*vNewUp.x += ((1.0f - cosTheta) * x * y - z * sinTheta) * mUp.getY();
*vNewUp.x += ((1.0f - cosTheta) * x * z + y * sinTheta) * mUp.getZ();
// Find the new y position for the new rotated point
*vNewUp.y = ((1.0f - cosTheta) * x * y + z * sinTheta) * mUp.getX();
*vNewUp.y += (cosTheta + (1.0f - cosTheta) * y * y) * mUp.getY();
*vNewUp.y += ((1.0f - cosTheta) * y * z - x * sinTheta) * mUp.getZ();
// Find the new z position for the new rotated point
*vNewUp.z = ((1.0f - cosTheta) * x * z - y * sinTheta) * mUp.getX();
*vNewUp.z += ((1.0f - cosTheta) * y * z + x * sinTheta) * mUp.getY();
*vNewUp.z += (cosTheta + (1.0f - cosTheta) * z * z) * mUp.getZ();
// Now we just add the newly rotated vector to our position to set
// our new rotated view of our camera.
mUp = vNewUp;
// mView = mEye + vNewView;
}
void Game::Init()
{
m_pShaderProgram = new CShaderProgram;
m_pSphere = new CSphere;
m_pTimer = new CHighResolutionTimer;
// This sets the position, viewpoint, and up vector of the synthetic camera
glm::vec3 vEye(0, 0, 20);
glm::vec3 vView(0, 0, 0);
glm::vec3 vUp(0, 1, 0);
glm::mat4 mViewMatrix = glm::lookAt(vEye, vView, vUp);
// This creates a view frustum
glm::mat4 mProjectionMatrix = glm::perspective(45.0f, 1.333f, 1.0f, 150.0f);
// This sets the background colour
glClearColor(0.5f, 0.5f, 0.5f, 1.0f);
glClearDepth(1.0);
// Load and compile shaders
CShader shVertex, shFragment;
shVertex.LoadShader("data\\shaders\\shader.vert", GL_VERTEX_SHADER);
shFragment.LoadShader("data\\shaders\\shader.frag", GL_FRAGMENT_SHADER);
// Create shader program and add shaders
m_pShaderProgram->CreateProgram();
m_pShaderProgram->AddShaderToProgram(&shVertex);
m_pShaderProgram->AddShaderToProgram(&shFragment);
// Link and use the program
m_pShaderProgram->LinkProgram();
m_pShaderProgram->UseProgram();
// Set the modeling, viewing, and projection matrices in the shader
m_pShaderProgram->SetUniform("viewMatrix", mViewMatrix);
m_pShaderProgram->SetUniform("projectionMatrix", mProjectionMatrix);
m_pShaderProgram->SetUniform("vlightDirection", glm::normalize(glm::vec3(0.5f, 0.5f, 0.5f)));
m_pShaderProgram->SetUniform("sampler0", 0);
m_pSphere->Create("data\\textures\\", "dirtpile01.jpg", 25, 25); // Texture downloaded from http://www.psionicgames.com/?page_id=26 on 24 Jan 2013
m_pTimer->Start();
}
void Camera::Update()
{
glm::vec3 vAxis(0.0f, 1.0f, 0.0f);
//Rotate the view vector by the horizontal angle around the vertical axis
glm::vec3 vView(1.0f, 0.0f, 0.0f);
vView = glm::rotate(vView, Theta, vAxis);
vView = glm::normalize(vView);
//Rotate the view vector by the vertical angle around the horizontal axis
glm::vec3 hAxis = glm::cross(vAxis, vView);
hAxis = glm::normalize(hAxis);
vView = glm::rotate(vView, Phi, hAxis);
target = vView;
target = glm::normalize(target);
up = glm::cross(target, hAxis);
up = glm::normalize(up);
}
