/*!
Rotates the node around an arbitrary point. The 'axis' and 'point' parameter
are relative to the space described by 'relativeTo'.
*/
void SLNode::rotateAround(const SLVec3f& point, SLVec3f& axis,
SLfloat angleDeg, SLTransformSpace relativeTo)
{
SLVec3f localPoint = point;
SLVec3f localAxis = axis;
if (relativeTo == TS_world && _parent)
{
localPoint = _parent->updateAndGetWMI() * point;
localAxis = _parent->updateAndGetWMI().mat3() * axis;
}
SLMat4f rot;
rot.translate(localPoint);
rot.rotate(angleDeg, localAxis);
rot.translate(-localPoint);
if (relativeTo == TS_object)
_om.setMatrix(_om * rot);
else
_om.setMatrix(rot * _om);
needUpdate();
}
//-----------------------------------------------------------------------------
//! Gets called whenever the mouse is moved.
SLbool SLCamera::onMouseMove(const SLMouseButton button,
const SLint x, const SLint y, const SLKey mod)
{
if (button == ButtonLeft) //================================================
{
// new vars needed
SLVec3f position = this->translation();
SLVec3f forward = this->forward();
SLVec3f right = this->right();
SLVec3f up = this->up();
// The lookAt point
SLVec3f laP = position + _focalDist * forward;
// Determine rotation point as the center of the AABB of the hitNode
SLVec3f rtP;
if (_lookAtRay.length < FLT_MAX && _lookAtRay.hitNode)
rtP = _lookAtRay.hitNode->aabb()->centerWS();
else rtP = laP;
// Determine rot angles around x- & y-axis
SLfloat dY = (y-_oldTouchPos1.y) * _rotFactor;
SLfloat dX = (x-_oldTouchPos1.x) * _rotFactor;
if (_camAnim==turntableYUp) //.......................................
{
SLMat4f rot;
rot.translate(rtP);
rot.rotate(-dX, SLVec3f(0,1,0));
rot.rotate(-dY, right);
rot.translate(-rtP);
_om.setMatrix(rot * _om);
needWMUpdate();
}
else if (_camAnim==turntableZUp) //..................................
{
SLMat4f rot;
rot.translate(rtP);
rot.rotate(dX, SLVec3f(0,0,1));
rot.rotate(dY, right);
rot.translate(-rtP);
_om.setMatrix(rot * _om);
needWMUpdate();
}
else if (_camAnim==walkingYUp) //....................................
{
dY *= 0.5f;
dX *= 0.5f;
SLMat4f rot;
rot.rotate(-dX, SLVec3f(0, 1, 0));
rot.rotate(-dY, right);
forward.set(rot.multVec(forward));
lookAt(position + forward);
}
else if (_camAnim==walkingZUp) //....................................
{
dY *= 0.5f;
dX *= 0.5f;
SLMat4f rot;
rot.rotate(-dX, SLVec3f(0, 0, 1));
rot.rotate(-dY, right);
forward.set(rot.multVec(forward));
lookAt(position + forward, SLVec3f(0, 0, 1));
}
_oldTouchPos1.set((SLfloat)x,(SLfloat)y);
}
else
if (button == ButtonMiddle) //==============================================
{ if (_camAnim==turntableYUp || _camAnim==turntableZUp)
{
// Calculate the fraction delta of the mouse movement
SLVec2f dMouse(x-_oldTouchPos1.x, _oldTouchPos1.y-y);
dMouse.x /= (SLfloat)_scrW;
dMouse.y /= (SLfloat)_scrH;
// Scale the mouse delta by the lookAt distance
SLfloat lookAtDist;
if (_lookAtRay.length < FLT_MAX)
lookAtDist = _lookAtRay.length;
else lookAtDist = _focalDist;
// scale factor depending on the space sice at focal dist
SLfloat spaceH = tan(SL_DEG2RAD*_fov/2) * lookAtDist * 2.0f;
SLfloat spaceW = spaceH * _aspect;
dMouse.x *= spaceW;
dMouse.y *= spaceH;
if (mod==KeyCtrl)
{
translate(SLVec3f(-dMouse.x, 0, dMouse.y), TS_Object);
} else
{
translate(SLVec3f(-dMouse.x, -dMouse.y, 0), TS_Object);
}
_oldTouchPos1.set((SLfloat)x,(SLfloat)y);
}
} //========================================================================
return true;
}
/*!
onPaint does all the rendering for one frame from scratch with OpenGL (in core
profile).
*/
bool onPaint()
{
// Clear the color & depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// View transform: move the coordinate system away from the camera
_viewMatrix.identity();
_viewMatrix.translate(0, 0, _camZ);
// View transform: rotate the coordinate system increasingly by the mouse
_viewMatrix.rotate(_rotX + _deltaX, 1,0,0);
_viewMatrix.rotate(_rotY + _deltaY, 0,1,0);
// Transform light position & direction into view space
SLVec3f lightPosVS = _viewMatrix * _lightPos;
// The light dir is not a position. We only take the rotation of the mv matrix.
SLMat3f viewRot = _viewMatrix.mat3();
SLVec3f lightDirVS = viewRot * _lightDir;
// Rotate the model so that we see the square from the front side
// or the earth from the equator.
_modelMatrix.identity();
_modelMatrix.rotate(90, -1,0,0);
// Build the combined model-view and model-view-projection matrix
SLMat4f mvp(_projectionMatrix);
SLMat4f mv(_viewMatrix * _modelMatrix);
mvp.multiply(mv);
// Build normal matrix
SLMat3f nm(mv.inverseTransposed());
// Pass the matrix uniform variables
glUniformMatrix4fv(_mvMatrixLoc, 1, 0, (float*)&mv);
glUniformMatrix3fv(_nMatrixLoc, 1, 0, (float*)&nm);
glUniformMatrix4fv(_mvpMatrixLoc, 1, 0, (float*)&mvp);
// Pass lighting uniforms variables
glUniform4fv(_globalAmbiLoc, 1, (float*)&_globalAmbi);
glUniform3fv(_lightPosVSLoc, 1, (float*)&lightPosVS);
glUniform3fv(_lightDirVSLoc, 1, (float*)&lightDirVS);
glUniform4fv(_lightAmbientLoc, 1, (float*)&_lightAmbient);
glUniform4fv(_lightDiffuseLoc, 1, (float*)&_lightDiffuse);
glUniform4fv(_lightSpecularLoc, 1, (float*)&_lightSpecular);
glUniform4fv(_matAmbientLoc, 1, (float*)&_matAmbient);
glUniform4fv(_matDiffuseLoc, 1, (float*)&_matDiffuse);
glUniform4fv(_matSpecularLoc, 1, (float*)&_matSpecular);
glUniform4fv(_matEmissiveLoc, 1, (float*)&_matEmissive);
glUniform1f (_matShininessLoc, _matShininess);
glUniform1i (_texture0Loc, 0);
//////////////////////
// Draw with 2 VBOs //
//////////////////////
// Enable all of the vertex attribute arrays
glEnableVertexAttribArray(_pLoc);
glEnableVertexAttribArray(_nLoc);
glEnableVertexAttribArray(_tLoc);
// Activate VBOs
glBindBuffer(GL_ARRAY_BUFFER, _vboV);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _vboI);
// Activate Texture
glBindTexture(GL_TEXTURE_2D, _textureID);
// For VBO only offset instead of data pointer
GLsizei stride = sizeof(VertexPNT);
GLsizei offsetN = sizeof(SLVec3f);
GLsizei offsetT = sizeof(SLVec3f) + sizeof(SLVec3f);
glVertexAttribPointer(_pLoc, 3, GL_FLOAT, GL_FALSE, stride, 0);
glVertexAttribPointer(_nLoc, 3, GL_FLOAT, GL_FALSE, stride, (void*)offsetN);
glVertexAttribPointer(_tLoc, 2, GL_FLOAT, GL_FALSE, stride, (void*)offsetT);
////////////////////////////////////////////////////////
// Draw cube model triangles by indexes
glDrawElements(GL_TRIANGLES, _numI, GL_UNSIGNED_INT, 0);
////////////////////////////////////////////////////////
// Deactivate buffers
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
// Disable the vertex arrays
glDisableVertexAttribArray(_pLoc);
glDisableVertexAttribArray(_nLoc);
glDisableVertexAttribArray(_tLoc);
// Check for errors from time to time
GETGLERROR;
// Fast copy the back buffer to the front buffer. This is OS dependent.
glfwSwapBuffers(window);
// Calculate frames per second
char title[255];
static float lastTimeSec = 0;
float timeNowSec = (float)glfwGetTime();
float fps = calcFPS(timeNowSec-lastTimeSec);
sprintf(title, "Sphere, %d x %d, fps: %4.0f", _resolution, _resolution, fps);
glfwSetWindowTitle(window, title);
lastTimeSec = timeNowSec;
// Return true to get an immediate refresh
return true;
}
//-----------------------------------------------------------------------------
//! Gets called whenever the mouse is moved.
SLbool SLCamera::onMouseMove(const SLMouseButton button,
const SLint x, const SLint y, const SLKey mod)
{
SLScene* s = SLScene::current;
SLSceneView* sv = s->activeSV();
if (button == ButtonLeft) //================================================
{
// Get camera vectors: eye pos., lookAt, lookUp, lookRight
SLVec3f eye, LA, LU, LR;
_vm.lookAt(&eye, &LA, &LU, &LR);
// The lookAt and lookUp point in VS
SLVec3f laP = eye + _focalDist * LA;
// Determine rotation point as the center of the AABB of the hitShape
SLVec3f rtP;
if (_lookAtRay.length < FLT_MAX && _lookAtRay.hitShape)
rtP = _lookAtRay.hitShape->aabb()->centerWS();
else rtP = laP;
// Determine rot angles around x- & y-axis
SLfloat dY = (_oldTouchPos1.y-y) * _rotFactor;
SLfloat dX = (_oldTouchPos1.x-x) * _rotFactor;
if (_camAnim==turntableYUp) //.......................................
{
// Apply rotation around the lookAt point
SLMat4f rot;
rot.translate(rtP);
rot.rotate(-dY, LR);
rot.rotate(-dX, SLVec3f(0,1,0));
rot.translate(-rtP);
_vm *= rot;
}
else if (_camAnim==turntableZUp) //..................................
{
// Apply rotation around the lookAt point
SLMat4f rot;
rot.translate(rtP);
rot.rotate(-dY, LR);
rot.rotate(-dX, SLVec3f(0,0,1));
rot.translate(-rtP);
_vm *= rot;
}
else if (_camAnim==walkingYUp) //....................................
{
dY *= 0.5f;
dX *= 0.5f;
// Apply rotation around the lookRight and the Y-axis
SLMat4f rot;
rot.rotate(-dY, LR);
rot.rotate(-dX, SLVec3f(0,1,0));
// rotate eye position
LA.set(rot*LA);
_vm.lookAt(eye, eye+LA*_focalDist, SLVec3f(0,1,0));
}
else if (_camAnim==walkingZUp) //....................................
{
dY *= 0.5f;
dX *= 0.5f;
// Apply rotation around the lookRight and the Z-axis
SLMat4f rot;
rot.rotate(-dY, LR);
rot.rotate(-dX, SLVec3f(0,0,1));
// rotate eye position
LA.set(rot*LA);
_vm.lookAt(eye, eye+LA*_focalDist, SLVec3f(0,0,1));
}
setWMandState();
_oldTouchPos1.set((SLfloat)x,(SLfloat)y);
return true;
}
else
if (button == ButtonMiddle) //==============================================
{ if (_camAnim==turntableYUp || _camAnim==turntableZUp)
{
// Calculate the fraction delta of the mouse movement
SLVec2f dMouse(x-_oldTouchPos1.x, _oldTouchPos1.y-y);
dMouse.x /= (SLfloat)sv->scrW();
dMouse.y /= (SLfloat)sv->scrH();
// Scale the mouse delta by the lookAt distance
SLfloat lookAtDist;
if (_lookAtRay.length < FLT_MAX)
lookAtDist = _lookAtRay.length;
else lookAtDist = _focalDist;
// scale factor depending on the space sice at focal dist
SLfloat spaceH = tan(SL_DEG2RAD*_fov/2) * lookAtDist * 2.0f;
SLfloat spaceW = spaceH * sv->scrWdivH();
dMouse.x *= spaceW;
dMouse.y *= spaceH;
if (mod==KeyCtrl)
{ _vm.translation(_vm.m(12) + dMouse.x,
_vm.m(13),
_vm.m(14) + dMouse.y);
} else
{ _vm.translation(_vm.m(12) + dMouse.x,
_vm.m(13) + dMouse.y,
_vm.m(14));
}
setWMandState();
_oldTouchPos1.set((SLfloat)x,(SLfloat)y);
return true;
}
} //========================================================================
return false;
}