/*! Concentric mapping of a x,y-position
Code taken from Peter Shirley out of "Realistic Ray Tracing"
*/
SLVec2f SLSamples2D::mapSquareToDisc(SLfloat x, // [0 < x <=1]
SLfloat y) // [0 < y <=1]
{ SLfloat phi, r, u, v;
SLfloat a = 2*x - 1;
SLfloat b = 2*y - 1;
if (a > -b)
{ if (a > b)
{ r = a;
phi = (SL_PI/4)*(b/a);
} else
{ r = b;
phi = (SL_PI/4)*(2 - a/b);
}
} else
{ if (a < b)
{ r = -a;
phi = (SL_PI/4)*(4 + b/a);
} else
{ r = -b;
if (b!=0)
{ phi = (SL_PI/4)*(6 - a/b);
} else phi = 0;
}
}
u = r*cos(phi);
v = r*sin(phi);
return SLVec2f(u,v);
}
/*! Returns the interpolated color at the pixel position p[x,y] for ray tracing.
x is expected to be between 0 and window width.
y is expected to be between 0 and window height.
C w B
+-----+
| p /|
| * / |
h | / |
| / |
|/ |
0 +-----+
A 0
*/
SLCol4f SLBackground::colorAtPos(SLfloat x, SLfloat y)
{
if (_isUniform)
return _colors[0];
if (_texture)
return _texture->getTexelf(x/_resX, y/_resY);
// top-down gradient
if (_colors[0]==_colors[2] && _colors[1]==_colors[3])
{ SLfloat f = y/_resY;
return f*_colors[0] + (1-f)*_colors[1];
}
// left-right gradient
if (_colors[0]==_colors[1] && _colors[2]==_colors[3])
{ SLfloat f = x/_resX;
return f*_colors[0] + (1-f)*_colors[2];
}
// Quadrilateral interpolation
// First check with barycentric coords if p is in the upper left triangle
SLVec2f p(x,y);
SLVec3f bc = p.barycentricCoords(SLVec2f(0,0),
SLVec2f((SLfloat)_resX,(SLfloat)_resY),
SLVec2f(0,(SLfloat)_resY));
SLfloat u = bc.x;
SLfloat v = bc.y;
SLfloat w = 1 - bc.x - bc.y;
SLCol4f color;
if (u>0 && v>0 && u+v<=1)
color = w*_colors[0] + u*_colors[1] + v*_colors[2]; // upper left triangle
else
{ u=1-u; v=1-v; w=1-u-v;
color = w*_colors[3] + v*_colors[1] + u*_colors[2]; // lower right triangle
}
return color;
}
/*!
Makes concentric 2D-samplespoints within a circle of certain radius.
With the parameter evenlyDistributed=false will the samplepoints be
denser towards the center.
*/
void SLSamples2D::distribConcentric(SLbool evenlyDistributed)
{ if (_points.size())
{ SLfloat halfDeltaPhi = SL_2PI/_samplesY*0.5f;
SLfloat phi, r, last_r = 1.0f;
// Loop over radius r and angle phi
for (SLint iR=_samplesX-1; iR>=0; --iR)
{ r = ((SLfloat)iR)/_samplesX;
if (evenlyDistributed) r = sqrt(r);
r += (last_r-r)*0.5f;
// every 2nd circle is rotated by have delta phi for better distribution
SLfloat iModPhi = (iR%2)*halfDeltaPhi;
for (SLint iPhi=_samplesY-1; iPhi>=0; --iPhi)
{ phi = SL_2PI*((SLfloat)iPhi)/_samplesY + iModPhi;
point(iR, iPhi, SLVec2f(r*cos(phi), r*sin(phi)));
}
last_r = r;
}
}
}
/*!
SLButton::buildBuffers creates the VAO for rendering
*/
void SLButton::buildBuffers()
{
SLVVec2f P; // vertex positions
SLVCol4f C; // colors
SLfloat x = _minX;
SLfloat y = _minY;
SLfloat w = _btnW;
SLfloat h = _btnH;
SLfloat mx = x + 2*_sv->dpmm()*BTN_GAP_W_MM; // center x of check mark
SLfloat my = y + h*0.5f; // center y of check mark
SLfloat diff1 = 0.3f; // button color difference upper to lower border
SLfloat diff2 = 0.6f; // border color difference upper to lower border
SLint nP = 0;
SLint nC = 0;
// up button
P.push_back(SLVec2f(x, y+h)); // button top left corner
P.push_back(SLVec2f(x, y )); // button bottom left corner
P.push_back(SLVec2f(x+w, y+h)); // button top right corner
P.push_back(SLVec2f(x+w, y )); // button bottom right corner
C.push_back(SLCol4f(_btnCol.r+diff1, _btnCol.g+diff1, _btnCol.b+diff1, _btnAlpha));
C.push_back(SLCol4f(_btnCol.r-diff1, _btnCol.g-diff1, _btnCol.b-diff1, _btnAlpha));
C.push_back(SLCol4f(_btnCol.r+diff1, _btnCol.g+diff1, _btnCol.b+diff1, _btnAlpha));
C.push_back(SLCol4f(_btnCol.r-diff1, _btnCol.g-diff1, _btnCol.b-diff1, _btnAlpha));
// down button
P.push_back(SLVec2f(x, y+h)); // button top left corner
P.push_back(SLVec2f(x, y )); // button bottom left corner
P.push_back(SLVec2f(x+w, y+h)); // button top right corner
P.push_back(SLVec2f(x+w, y )); // button bottom right corner
C.push_back(SLCol4f(_btnCol.r+diff1, _btnCol.g+diff1, _btnCol.b+diff1, _btnAlpha));
C.push_back(SLCol4f(_btnCol.r+diff1, _btnCol.g+diff1, _btnCol.b+diff1, _btnAlpha));
C.push_back(SLCol4f(_btnCol.r+diff1, _btnCol.g+diff1, _btnCol.b+diff1, _btnAlpha));
C.push_back(SLCol4f(_btnCol.r+diff1, _btnCol.g+diff1, _btnCol.b+diff1, _btnAlpha));
// pressed button
P.push_back(SLVec2f(x, y+h)); // button top left corner
P.push_back(SLVec2f(x, y )); // button bottom left corner
P.push_back(SLVec2f(x+w, y+h)); // button top right corner
P.push_back(SLVec2f(x+w, y )); // button bottom right corner
C.push_back(SLCol4f(_btnCol.r-diff1, _btnCol.g-diff1, _btnCol.b-diff1, _btnAlpha));
C.push_back(SLCol4f(_btnCol.r+diff1, _btnCol.g+diff1, _btnCol.b+diff1, _btnAlpha));
C.push_back(SLCol4f(_btnCol.r-diff1, _btnCol.g-diff1, _btnCol.b-diff1, _btnAlpha));
C.push_back(SLCol4f(_btnCol.r+diff1, _btnCol.g+diff1, _btnCol.b+diff1, _btnAlpha));
// down border
P.push_back(SLVec2f(x, y )); // button bottom left corner
P.push_back(SLVec2f(x+w, y )); // button bottom right corner
P.push_back(SLVec2f(x+w, y+h)); // button top right corner
P.push_back(SLVec2f(x, y+h)); // button top left corner
C.push_back(SLCol4f(_btnCol.r+diff2, _btnCol.g+diff2, _btnCol.b+diff2, 1.0f));
C.push_back(SLCol4f(_btnCol.r+diff2, _btnCol.g+diff2, _btnCol.b+diff2, 1.0f));
C.push_back(SLCol4f(_btnCol.r-diff2, _btnCol.g-diff2, _btnCol.b-diff2, 1.0f));
C.push_back(SLCol4f(_btnCol.r-diff2, _btnCol.g-diff2, _btnCol.b-diff2, 1.0f));
// up border
P.push_back(SLVec2f(x, y )); // button bottom left corner
P.push_back(SLVec2f(x+w, y )); // button bottom right corner
P.push_back(SLVec2f(x+w, y+h)); // button top right corner
P.push_back(SLVec2f(x, y+h)); // button top left corner
C.push_back(SLCol4f(_btnCol.r-diff2, _btnCol.g-diff2, _btnCol.b-diff2, 1.0f));
C.push_back(SLCol4f(_btnCol.r-diff2, _btnCol.g-diff2, _btnCol.b-diff2, 1.0f));
C.push_back(SLCol4f(_btnCol.r+diff2, _btnCol.g+diff2, _btnCol.b+diff2, 1.0f));
C.push_back(SLCol4f(_btnCol.r+diff2, _btnCol.g+diff2, _btnCol.b+diff2, 1.0f));
// White check box
P.push_back(SLVec2f(mx-5, my-5)); // 1st point of check box rect
P.push_back(SLVec2f(mx+5, my-5)); // 2nd point of check box rect
P.push_back(SLVec2f(mx+5, my+5)); // 3rd point of check box rect
P.push_back(SLVec2f(mx-5, my+5)); // 4th point of check box rect
C.push_back(SLCol4f(_btnCol.r-diff2, _btnCol.g-diff2, _btnCol.b-diff2, 1.0f));
C.push_back(SLCol4f(_btnCol.r-diff2, _btnCol.g-diff2, _btnCol.b-diff2, 1.0f));
C.push_back(SLCol4f(_btnCol.r-diff2, _btnCol.g-diff2, _btnCol.b-diff2, 1.0f));
C.push_back(SLCol4f(_btnCol.r-diff2, _btnCol.g-diff2, _btnCol.b-diff2, 1.0f));
// White check mark
P.push_back(SLVec2f(mx-4, my+4)); // 1st point of check mark
P.push_back(SLVec2f(mx+4, my-4)); // 2nd point of check mark
P.push_back(SLVec2f(mx-4, my-4)); // 3rd point of check mark
P.push_back(SLVec2f(mx+4, my+4)); // 4th point of check mark
C.push_back(SLCol4f(1,1,1,0.8f));
C.push_back(SLCol4f(1,1,1,0.8f));
C.push_back(SLCol4f(1,1,1,0.8f));
C.push_back(SLCol4f(1,1,1,0.8f));
// create buffers on GPU
SLGLProgram* sp = SLScene::current->programs(SP_colorAttribute);
sp->useProgram();
_vao.setAttrib(AT_position, sp->getAttribLocation("a_position"), &P);
_vao.setAttrib(AT_color, sp->getAttribLocation("a_color"), &C);
_vao.generate((SLuint)P.size());
}
#ifdef SL_MEMLEAKDETECT // set in SL.h for debug config only
#include <debug_new.h> // memory leak detector
#endif
#include <SLButton.h>
#include <SLCamera.h>
//-----------------------------------------------------------------------------
const SLfloat BTN_TXT2BTN_H_FACTOR = 1.0f; // Button height factor from text hight
const SLfloat BTN_BORDER_W_MM = 3.0f; // Horizontal border in mm
const SLfloat BTN_GAP_W_MM = 0.7f; // Horizontal gap in mm
const SLfloat BTN_GAP_H_MM = 0.7f; // vertical gap in mm
//-----------------------------------------------------------------------------
SLButton* SLButton::buttonDown = 0;
SLButton* SLButton::buttonParent = 0;
SLVec2f SLButton::minMenuPos = SLVec2f(10,10); //!< Lower left corner of menu
SLVec2f SLButton::newMenuPos = SLVec2f(0,0);
SLVec2f SLButton::oldMenuPos = SLVec2f(0,0);
//-----------------------------------------------------------------------------
/*! SLButton Constructor:
If command is C_menu the button is supposed to have sub menu buttons.
If isCheckable is true the button gets a check box
If isChecked is true the check box gets a little cross
If radioParent is a parent button all of it checkable children act as radio buttons.
If closeOnClick is true the entire menu gets closed after command execution.
*/
SLButton::SLButton(SLSceneView* sv,
SLstring text,
SLTexFont* txtFont,
SLCommand command,
SLbool isCheckable,
