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/*
SCREENFillArc.cpp
Draw a filled arc, like a part of a pie-chart.
AUTHORS:
Allen.Ingling@nyu.edu awi
mario.kleiner at tuebingen.mpg.de mk
PLATFORMS:
Should compile and work for all platforms.
NOTES:
HISTORY:
12/11/05 mk Created. Derived from Allen Inglings gluDisc.
TO DO:
*/
#include "Screen.h"
// The routine that does the real work - see at bottom of file:
void PsychRenderArc(unsigned int mode);
PsychError SCREENDrawArc(void)
{
// If you change useString then also change the corresponding synopsis string in ScreenSynopsis.c
static char useString[] = "Screen('DrawArc',windowPtr,[color],[rect],startAngle,arcAngle)";
// 1 2 3 4 5
static char synopsisString[] =
"Draw an arc inscribed within the rect. 'color' is the clut index (scalar "
"or [r g b] triplet) that you want to poke into each pixel; default produces "
"black with the standard CLUT for this window's pixelSize. Default 'rect' is "
"entire window. Angles are measured clockwise from vertical.";
static char seeAlsoString[] = "FrameArc FillArc";
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check for superfluous arguments
PsychErrorExit(PsychCapNumInputArgs(5)); //The maximum number of inputs
PsychErrorExit(PsychRequireNumInputArgs(3)); //The minimum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(0)); //The maximum number of outputs
// Render arc of type 1 - Just the outline.
PsychRenderArc(1);
return(PsychError_none);
}
PsychError SCREENFrameArc(void)
{
// If you change useString then also change the corresponding synopsis string in ScreenSynopsis.c
static char useString[] = "Screen('FrameArc',windowPtr,[color],[rect],startAngle,arcAngle, [penWidth], [penHeight], [penMode])";
// 1 2 3 4 5 6 7 8
static char synopsisString[] =
"Draw an arc inscribed within the rect. 'color' is the clut index (scalar "
"or [r g b] triplet) that you want to poke into each pixel; default produces "
"black with the standard CLUT for this window's pixelSize. Default 'rect' is "
"entire window. Angles are measured clockwise from vertical. 'penWidth' and "
"'penHeight' are the width and height of the pen to use. penWidth must equal "
"penHeight and the 'penMode' argument is currently ignored.";
static char seeAlsoString[] = "DrawArc FillArc";
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check for superfluous arguments
PsychErrorExit(PsychCapNumInputArgs(8)); //The maximum number of inputs
PsychErrorExit(PsychRequireNumInputArgs(3)); //The minimum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(0)); //The maximum number of outputs
// Render arc of type 2 - Just the outline with penWidth.
PsychRenderArc(2);
return(PsychError_none);
}
PsychError SCREENFillArc(void)
{
// If you change useString then also change the corresponding synopsis string in ScreenSynopsis.c
static char useString[] = "Screen('FillArc',windowPtr,[color],[rect],startAngle,arcAngle)";
// 1 2 3 4 5
static char synopsisString[] =
"Draw a filled arc inscribed within the rect. 'color' is the clut index (scalar "
"or [r g b a] triplet) that you want to poke into each pixel; default produces "
"black with the standard CLUT for this window's pixelSize. Default 'rect' is "
"entire window. Angles are measured clockwise from vertical.";
static char seeAlsoString[] = "DrawArc FrameArc";
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString,seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check for superfluous arguments
PsychErrorExit(PsychCapNumInputArgs(5)); //The maximum number of inputs
PsychErrorExit(PsychRequireNumInputArgs(3)); //The minimum number of inputs
PsychErrorExit(PsychCapNumOutputArgs(0)); //The maximum number of outputs
// Render arc of type 3 - Filled arc.
PsychRenderArc(3);
return(PsychError_none);
}
void PsychRenderArc(unsigned int mode)
{
PsychColorType color;
PsychRectType rect;
double *startAngle, *arcAngle, *penWidth, *penHeight;
PsychWindowRecordType *windowRecord;
double whiteValue;
double dotSize = 1;
psych_bool isArgThere;
GLUquadric *diskQuadric = NULL;
double cx, cy, w, h;
//get the window record from the window record argument and get info from the window record
PsychAllocInWindowRecordArg(kPsychUseDefaultArgPosition, TRUE, &windowRecord);
//Get the color argument or use the default, then coerce to the form determened by the window depth.
isArgThere=PsychCopyInColorArg(kPsychUseDefaultArgPosition, FALSE, &color);
if(!isArgThere){
whiteValue=PsychGetWhiteValueFromWindow(windowRecord);
PsychLoadColorStruct(&color, kPsychIndexColor, whiteValue ); //index mode will coerce to any other.
}
PsychCoerceColorMode( &color);
// Get the rect to which the object should be inscribed: Default is "full screen"
PsychMakeRect(rect, 0, 0, PsychGetWidthFromRect(windowRecord->clientrect), PsychGetHeightFromRect(windowRecord->clientrect));
PsychCopyInRectArg(3, FALSE, rect);
if (IsPsychRectEmpty(rect)) return;
w=PsychGetWidthFromRect(rect);
h=PsychGetHeightFromRect(rect);
PsychGetCenterFromRectAbsolute(rect, &cx, &cy);
if (w==0 || h==0) PsychErrorExitMsg(PsychError_user, "Invalid rect (width or height equals zero) provided!");
// Get start angle:
PsychAllocInDoubleArg(4, TRUE, &startAngle);
PsychAllocInDoubleArg(5, TRUE, &arcAngle);
if (mode==2) {
// Get pen width and height:
penWidth=NULL;
penHeight=NULL;
PsychAllocInDoubleArg(6, FALSE, &penWidth);
PsychAllocInDoubleArg(7, FALSE, &penHeight);
// Check if penWidth and penHeight spec'd. If so, they
// need to be equal:
if (penWidth && penHeight && (*penWidth!=*penHeight)) {
PsychErrorExitMsg(PsychError_user, "penWidth and penHeight must be equal if both are specified!");
}
dotSize=1;
if (penWidth) dotSize = *penWidth;
if (penHeight) dotSize = *penHeight;
}
// Enable this windowRecords framebuffer as current drawingtarget:
PsychSetDrawingTarget(windowRecord);
// Set default drawshader:
PsychSetShader(windowRecord, -1);
PsychUpdateAlphaBlendingFactorLazily(windowRecord);
PsychSetGLColor(&color, windowRecord);
if (PsychIsGLClassic(windowRecord)) {
// Backup our modelview matrix:
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
// Position disk at center of rect:
glTranslated(cx, cy, 0);
// Scale in order to fit to rect in case w!=h:
glScaled(1.0, -h/w, 1.0);
// Draw filled partial disk:
diskQuadric=gluNewQuadric();
switch (mode) {
case 1: // One pixel thin arc: InnerRadius = OuterRadius - 1
gluPartialDisk(diskQuadric, (w/2) - 1.0, w/2, (int) w, 2, *startAngle, *arcAngle);
break;
case 2: // dotSize thick arc: InnerRadius = OuterRadius - dotsize
gluPartialDisk(diskQuadric, (dotSize < (w/2)) ? (w/2) - dotSize : 0, w/2, (int) w, 2, *startAngle, *arcAngle);
break;
case 3: // Filled arc:
gluPartialDisk(diskQuadric, 0, w/2, (int) w, 1, *startAngle, *arcAngle);
break;
}
gluDeleteQuadric(diskQuadric);
// Restore old matrix:
glPopMatrix();
}
else {
switch (mode) {
case 1: // One pixel thin arc: InnerRadius = OuterRadius - 1
PsychDrawDisc(windowRecord, (float) cx, (float) cy, (float) ((w/2) - 1.0), (float) w/2, (int) w, (float) 1, (float) -h / (float) w, (float) *startAngle, (float) *arcAngle);
break;
case 2: // dotSize thick arc: InnerRadius = OuterRadius - dotsize
PsychDrawDisc(windowRecord, (float) cx, (float) cy, (float) ((dotSize < (w/2)) ? (w/2) - dotSize : 0), (float) w / 2, (int) w, (float) 1, (float) -h/ (float) w, (float) *startAngle, (float) *arcAngle);
break;
case 3: // Filled arc:
PsychDrawDisc(windowRecord, (float) cx, (float) cy, (float) 0, (float) w / 2, (int) w, (float) 1, (float) -h / (float) w, (float) *startAngle, (float) *arcAngle);
break;
}
}
// Mark end of drawing op. This is needed for single buffered drawing:
PsychFlushGL(windowRecord);
return;
}
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