glm::mat3 RotateAxis(float fElapsedTime)
{
float fAngRad = ComputeAngleRad(fElapsedTime, 2.0);
float fCos = cosf(fAngRad);
float fInvCos = 1.0f - fCos;
float fSin = sinf(fAngRad);
float fInvSin = 1.0f - fSin;
glm::vec3 axis(1.0f, 1.0f, 1.0f);
axis = glm::normalize(axis);
glm::mat3 theMat(1.0f);
theMat[0].x = (axis.x * axis.x) + ((1 - axis.x * axis.x) * fCos);
theMat[1].x = axis.x * axis.y * (fInvCos) - (axis.z * fSin);
theMat[2].x = axis.x * axis.z * (fInvCos) + (axis.y * fSin);
theMat[0].y = axis.x * axis.y * (fInvCos) + (axis.z * fSin);
theMat[1].y = (axis.y * axis.y) + ((1 - axis.y * axis.y) * fCos);
theMat[2].y = axis.y * axis.z * (fInvCos) - (axis.x * fSin);
theMat[0].z = axis.x * axis.z * (fInvCos) - (axis.y * fSin);
theMat[1].z = axis.y * axis.z * (fInvCos) + (axis.x * fSin);
theMat[2].z = (axis.z * axis.z) + ((1 - axis.z * axis.z) * fCos);
return theMat;
}
glm::mat4 ConstructMatrix(float fElapsedTime) {
const glm::mat3 &rotMatrix = CalcRotation(fElapsedTime);
glm::mat4 theMat(rotMatrix);
theMat[3] = glm::vec4(offset, 1.0f);
return theMat;
}
glm::mat4 ConstructMatrix(float fElapsedTime) {
glm::mat4 theMat(1.0f);
theMat[3] = glm::vec4(CalcOffset(fElapsedTime), 1.0f);
return theMat;
}
glm::mat3 RotateZ(float fElapsedTime) {
float fAngRad = ComputeAngleRad(fElapsedTime, 2.0);
float fCos = cosf(fAngRad);
float fSin = sinf(fAngRad);
glm::mat3 theMat(1.0f);
theMat[0].x = fCos; theMat[1].x = -fSin;
theMat[0].y = fSin; theMat[1].y = fCos;
return theMat;
}
glm::mat4 ConstructMatrix(float fElapsedTime)
{
glm::vec3 theScale = CalcScale(fElapsedTime);
glm::mat4 theMat(1.0f);
theMat[0].x = theScale.x;
theMat[1].y = theScale.y;
theMat[2].z = theScale.z;
theMat[3] = glm::vec4(offset, 1.0f);
return theMat;
}
glm::mat3 RotateZ(float fAngDeg)
{
float fAngRad = DegToRad(fAngDeg);
float fCos = cosf(fAngRad);
float fSin = sinf(fAngRad);
glm::mat3 theMat(1.0f);
theMat[0].x = fCos; theMat[1].x = -fSin;
theMat[0].y = fSin; theMat[1].y = fCos;
return theMat;
}
static glm::mat3 RotateZ(float angDeg)
{
float angRad = DegToRad(angDeg);
float cos = cosf(angRad);
float sin = sinf(angRad);
glm::mat3 theMat(1.0f);
theMat[0].x = cos;
theMat[1].x = -sin;
theMat[0].y = sin;
theMat[1].y = cos;
return theMat;
}
glm::mat4 ViewPole::CalcMatrix() const
{
glm::mat4 theMat(1.0f);
//Remember: these transforms are in reverse order.
//In this space, we are facing in the correct direction. Which means that the camera point
//is directly behind us by the radius number of units.
theMat = glm::translate(theMat, glm::vec3(0.0f, 0.0f, -m_currView.radius));
//Rotate the world to look in the right direction..
glm::fquat fullRotation = glm::angleAxis(m_currView.degSpinRotation, glm::vec3(0.0f, 0.0f, 1.0f)) *
m_currView.orient;
theMat = theMat * glm::mat4_cast(fullRotation);
//Translate the world by the negation of the lookat point, placing the origin at the
//lookat point.
theMat = glm::translate(theMat, -m_currView.targetPos);
return theMat;
}
void MatrixStack::RotateRadians( const glm::vec3 axisOfRotation, float angRadCCW )
{
float fCos = cosf(angRadCCW);
float fInvCos = 1.0f - fCos;
float fSin = sinf(angRadCCW);
//float fInvSin = 1.0f - fSin;
glm::vec3 axis = glm::normalize(axisOfRotation);
glm::mat4 theMat(1.0f);
theMat[0].x = (axis.x * axis.x) + ((1 - axis.x * axis.x) * fCos);
theMat[1].x = axis.x * axis.y * (fInvCos) - (axis.z * fSin);
theMat[2].x = axis.x * axis.z * (fInvCos) + (axis.y * fSin);
theMat[0].y = axis.x * axis.y * (fInvCos) + (axis.z * fSin);
theMat[1].y = (axis.y * axis.y) + ((1 - axis.y * axis.y) * fCos);
theMat[2].y = axis.y * axis.z * (fInvCos) - (axis.x * fSin);
theMat[0].z = axis.x * axis.z * (fInvCos) - (axis.y * fSin);
theMat[1].z = axis.y * axis.z * (fInvCos) + (axis.x * fSin);
theMat[2].z = (axis.z * axis.z) + ((1 - axis.z * axis.z) * fCos);
m_currMatrix *= theMat;
}