inline bool
DrawingCursor::mayMoveDownwards(void) {
return NodeCursor<VisualNode>::mayMoveDownwards() &&
!node()->isHidden() &&
node()->childrenLayoutIsDone() &&
!isClipped();
}
//------------------------------------------------------------------------------
int GzPutTriangle(GzRender *render, int numParts, GzToken *nameList, GzPointer *valueList) {
/* numParts : how many names and values */
// Do some sanity checking
if(NULL == render || NULL == nameList || NULL == valueList || numParts != 3)
{
return GZ_FAILURE;
}
Matrix *Xsm = render->xStack.leftMulMatricesOnStack();
if (Xsm == NULL)
{
fprintf(stderr, "Got NULL from stack in GzPutTriangle.\n");
}
GzCoord *c_old;
GzCoord *n;
GzColor triEdgeColors[3];
GzTextureIndex *triTextures;
for (int i = 0; i < numParts; i++)
{
int name = nameList[i];
switch(name)
{
case GZ_POSITION:
{
// Get ready to read coordinates
void *l1 = valueList;
GzCoord **l2 = static_cast<GzCoord **> (l1);
c_old = static_cast<GzCoord *> (l2[i]);
break;
}
case GZ_NORMAL:
{
void *l1 = valueList;
GzCoord **l2 = static_cast<GzCoord **> (l1);
n = static_cast<GzCoord *> (l2[i]);
if (render->interp_mode == GZ_COLOR)
{
for (int k = 0; k < 3; k++)
calc_color(render, n[k], triEdgeColors[k], (render->tex_fun == false));
}
break;
}
case GZ_TEXTURE_INDEX:
{
void *l1 = valueList;
GzTextureIndex **l2 = static_cast<GzTextureIndex**> (l1);
triTextures = l2[i];
break;
}
default:
return GZ_FAILURE;
}// end of switch statement
}//end of for loop
GzCoord c[3];
// Transform triangle coordinates into screen coordinates
for(int i = 0; i < 3 ; i++)
{
float array[4] = {c_old[i][0], c_old[i][1], c_old[i][2], 1};
float rMulResult[4] ={0, 0, 0, 0};
Xsm->rightMultiply(array, 4, rMulResult);
c[i][X] = rMulResult[0] + render->aa_delta_x;
c[i][Y] = rMulResult[1] + render->aa_delta_y;
c[i][Z] = rMulResult[2];
}
// Lets see if all 3 triangle coordinates are viewable or not.
if(isBehindViewPlane(render, c) || isClipped(render, c))
return GZ_FAILURE;
// Find bounding box
int x_min = floor(findMin(c, 0, 3));
int x_max = ceil (findMax(c, 0, 3));
int y_min = floor(findMin(c, 1, 3));
int y_max = ceil (findMax(c, 1, 3));
// Iterate over every pixel in the bounding box
for(int j = y_min; j <= y_max; j++)
for(int i = x_min; i <= x_max; i++)
{
// Calculate Barycentric coordinates
GzCoord p = {float(i), float(j), 0};
float alpha = f(c[1], c[2], p) / f(c[1], c[2], c[0]);
float beta = f(c[2], c[0], p) / f(c[2], c[0], c[1]);
float gamma = f(c[0], c[1], p) / f(c[0], c[1], c[2]);
// Litmus Test: Is pixel (i,j) inside triangle?
if ( alpha > 0 && beta > 0 && gamma > 0)
{
//interpolate z value
float newZ = alpha*(c[0][2]) + beta*(c[1][2]) + gamma*(c[2][2]);
// Get current Z value for this specific pixel (i,j)
GzIntensity dummy;
GzDepth oldZ;
GzGetDisplay(render->display, i, j, &dummy, &dummy, &dummy, &dummy, &oldZ);
// Check will this pixel be displayed or not
if(newZ < oldZ)
{
GzColor interpColor = {0, 0, 0};
GzColor color = {1.0f, 1.0f, 1.0f}; // color coming from texture
if(render->tex_fun != false)
calcTexture(render, triTextures, c, newZ, alpha, beta, gamma, color);
if(render->interp_mode == GZ_NORMALS) // Phong Shading
{
GzCoord interpN = {0,0,0};
for (int k = 0; k < 3; k++)
interpN[k] = alpha*n[0][k] + beta*n[1][k] + gamma*n[2][k];
if(render->tex_fun != false)
{
memcpy(render->Ka, color, sizeof (GzColor));
memcpy(render->Kd, color, sizeof (GzColor));
}
calc_color(render, interpN, interpColor, true);
GzPutDisplay(render->display, i, j, ctoi(interpColor[X]), ctoi(interpColor[Y]), ctoi(interpColor[Z]), 1, newZ);
}
else if(render->interp_mode == GZ_COLOR) // Gouraud Shading
{
float r = alpha * triEdgeColors[0][X] + beta * triEdgeColors[1][X] + gamma * triEdgeColors[2][X];
float g = alpha * triEdgeColors[0][Y] + beta * triEdgeColors[1][Y] + gamma * triEdgeColors[2][Y];
float b = alpha * triEdgeColors[0][Z] + beta * triEdgeColors[1][Z] + gamma * triEdgeColors[2][Z];
// Multiply by Kt which is in color due to earlier texture calculation
r *= color[RED];
g *= color[GREEN];
b *= color[BLUE];
GzPutDisplay(render->display, i, j, ctoi(r), ctoi(g), ctoi(b), 1, newZ);
}
// FLAT Shading
//GzPutDisplay(render->display, i, j, ctoi(render->flatcolor[0]),
//ctoi(render->flatcolor[1]), ctoi(render->flatcolor[2]), 1, newZ);
}
}// end of litmus test if
}
return GZ_SUCCESS;
}
void MarkedScrollBar::paintEvent(QPaintEvent *event)
{
// Draw the scrollbar control
QScrollBar::paintEvent(event);
// Get the style options for the control
QStyleOptionSlider styleOption;
initStyleOption(&styleOption);
// Get the bounding rectangles of the add/sub pages
QRect addPage = style()->subControlRect(QStyle::CC_ScrollBar, &styleOption,
QStyle::SC_ScrollBarAddPage, this);
QRect subPage = style()->subControlRect(QStyle::CC_ScrollBar, &styleOption,
QStyle::SC_ScrollBarSubPage, this);
QRect slider = style()->subControlRect(QStyle::CC_ScrollBar, &styleOption,
QStyle::SC_ScrollBarSlider, this);
// Create a painter to do the actual drawing
QPainter p(this);
// Clip it so that we do not draw over the slider
if (isClipped())
{
p.setClipRegion(QRegion(addPage) + QRegion(subPage));
}
// The scale factor to use
qreal sf;
// Scale and translate the painter appropriately
if (orientation() == Qt::Horizontal)
{
p.translate(qMin(subPage.left(), addPage.left()), 0.0);
sf = (addPage.width() + subPage.width() + slider.width())
/ ((qreal) maximum() - minimum());
}
else // if (orientation() == Qt::Vertical)
{
p.translate(0.0, qMin(subPage.top(), addPage.top()));
sf = (addPage.height() + subPage.height() + slider.height())
/ ((qreal) maximum() - minimum());
}
foreach (markData mark, m_marks)
{
p.setPen(mark.colour);
if (orientation() == Qt::Horizontal)
{
p.drawLine(QPoint(mark.pos * sf, 2),
QPoint(mark.pos * sf, slider.height() - 3));
}
else if (orientation() == Qt::Vertical)
{
p.drawLine(QPoint(2, mark.pos * sf),
QPoint(slider.width() - 3, mark.pos * sf));
}
}