static OfxStatus
interactPenDown(OfxImageEffectHandle pluginInstance,
OfxInteractHandle interactInstance,
OfxPropertySetHandle inArgs)
{
// get my data handle
MyInteractData *data = getInteractData(interactInstance);
// get the point param's value
double x, y;
gParamHost->paramGetValue(data->pointParam, &x, &y);
// get the size of a pixel on screen
double pixelScale[2];
ofxuGetInteractPixelScale(inArgs, pixelScale);
// see if the pen is within 5 screen pixels of the point, in which case, select it
double penPos[2];
gPropHost->propGetDoubleN(inArgs, kOfxInteractPropPenPosition, 2, penPos);
if(fabs(x - penPos[0]) < 5 * pixelScale[0] && fabs(y - penPos[1]) < 5 * pixelScale[1]) {
data->selected = true;
return kOfxStatOK;
}
return kOfxStatReplyDefault;
}
static OfxStatus
interactPenDown(OfxImageEffectHandle pluginInstance,
OfxInteractHandle interactInstance,
OfxPropertySetHandle inArgs)
{
// get my data handle
MyInteractData *data = getInteractData(interactInstance);
// get the project size as we are normalising to this
OfxPointD projSize, projOffset;
ofxuGetProjectSetup(pluginInstance, projSize, projOffset);
// get the point param's value
double x, y;
gParamHost->paramGetValue(data->pointParam, &x, &y);
// scale it up to the project size as it is a normalised spatial parameter
x = projOffset.x + x * projSize.x;
y = projOffset.y + y * projSize.y;
// get the size of a pixel on screen
double pixelScale[2];
ofxuGetInteractPixelScale(inArgs, pixelScale);
// see if the pen is within 5 screen pixels of the point, in which case, select it
double penPos[2];
gPropHost->propGetDoubleN(inArgs, kOfxInteractPropPenPosition, 2, penPos);
if(fabs(x - penPos[0]) < 5 * pixelScale[0] && fabs(y - penPos[1]) < 5 * pixelScale[1]) {
data->selected = true;
return kOfxStatOK;
}
return kOfxStatReplyDefault;
}
// draw an interact instance
static OfxStatus
interactDraw(OfxImageEffectHandle pluginInstance,
OfxInteractHandle interactInstance,
OfxPropertySetHandle drawArgs)
{
OfxStatus err;
// get my private interact data
MyInteractData *data = getInteractData(interactInstance);
// get the project size
OfxPointD projSize, projOffset;
ofxuGetProjectSetup(pluginInstance, projSize, projOffset);
// get the size of a pixel in the current projection
double pixelScale[2];
ofxuGetInteractPixelScale(drawArgs, pixelScale);
// get my param's value
double x, y;
if((err = getCustomParam(pluginInstance, x, y)) != kOfxStatOK)
return err;
// scale it up to the project size as it is normalised
x = projOffset.x + x * projSize.x;
y = projOffset.y + y * projSize.y;
// make the xhair a constant size on screen by scaling by the pixel scale
float dx = kXHairSize * pixelScale[0];
float dy = kXHairSize * pixelScale[1];
// if the we have selected the Xhair, draw it highlit
if(data->selected)
glColor3f(1, 1, 1);
else
glColor3f(1, 0, 0);
// Draw a cross hair, the current coordinate system aligns with the image plane.
glPushMatrix();
glTranslated(x, y, 0);
glBegin(GL_LINES);
glVertex2f(-dx, 0);
glVertex2f(dx, 0);
glVertex2f(0, -dy);
glVertex2f(0, dy);
glEnd();
glPopMatrix();
return kOfxStatOK;
}
// draw an interact instance
static OfxStatus
interactDraw(OfxImageEffectHandle pluginInstance,
OfxInteractHandle interactInstance,
OfxPropertySetHandle drawArgs)
{
// get my private interact data
MyInteractData *data = getInteractData(interactInstance);
// get the size of a pixel in the current projection
double pixelScale[2];
ofxuGetInteractPixelScale(drawArgs, pixelScale);
// get my param's value
double x, y;
gParamHost->paramGetValue(data->pointParam, &x, &y);
// make the xhair a constant size on screen by scaling by the pixel scale
float dx = kXHairSize * pixelScale[0];
float dy = kXHairSize * pixelScale[1];
// if the we have selected the Xhair, draw it highlit
if(data->selected)
glColor3f(1, 1, 1);
else
glColor3f(1, 0, 0);
// Draw a cross hair, the current coordinate system aligns with the image plane.
glPushMatrix();
glTranslated(x, y, 0);
glBegin(GL_LINES);
glVertex2f(-dx, 0);
glVertex2f(dx, 0);
glVertex2f(0, -dy);
glVertex2f(0, dy);
glEnd();
glPopMatrix();
return kOfxStatOK;
}
