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TempleOSCD_150720.ISO

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Terry A. Davis authored and minexew committed 2018-09-08 21:46:22 +02:00
1 parent 401601816c
commit f8c05f98f4
554 files changed
+26046 -24853
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Adam/Gr/GrPrimatives.CPP
+93 -83
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@@ -1,6 +1,7 @@
#help_index "Graphics"
public Bool GrClamp(CDC *dc=gr.dc,I64 *left,I64 *top,I64 *right,I64 *bottom,I64 width=0,I64 height=0)
public Bool GrClamp(CDC *dc=gr.dc,I64 *left,I64 *top,I64 *right,I64 *bottom,
I64 width=0,I64 height=0)
{//Returns screen, not window coordinates.
CTask *win_task;
*left=0;
@@ -29,7 +30,8 @@ public Bool GrClamp(CDC *dc=gr.dc,I64 *left,I64 *top,I64 *right,I64 *bottom,I64
return *left<=*right && *top<=*bottom;
}
Bool DCClipLine(CDC *dc=gr.dc,I64 *x1,I64 *y1,I64 *x2,I64 *y2,I64 width=0,I64 height=0)
Bool DCClipLine(CDC *dc=gr.dc,I64 *x1,I64 *y1,I64 *x2,I64 *y2,
I64 width=0,I64 height=0)
{//Also converts window to screen coordinates
I64 left,top,right,bottom;
CTask *win_task;
@@ -63,15 +65,15 @@ public Bool GrPlot(CDC *dc=gr.dc,I64 x,I64 y)
x+=win_task->pix_left+win_task->scroll_x;
y+=win_task->pix_top+win_task->scroll_y;
if (win_task->pix_left<=x<=win_task->pix_right &&
win_task->pix_top <=y<=win_task->pix_bottom &&
0<=x<dc->width && 0<=y<dc->height &&
(win_task->next_task==sys_winmgr_task ||
dc->flags&DCF_ON_TOP ||
!IsPixCovered0(win_task,x,y)))
win_task->pix_top <=y<=win_task->pix_bottom &&
0<=x<dc->width && 0<=y<dc->height &&
(win_task->next_task==sys_winmgr_task ||
dc->flags&DCF_ON_TOP ||
!IsPixCovered0(win_task,x,y)))
GrPlot0(dc,x,y);
} else
if (0<=x<dc->width && 0<=y<dc->height)
GrPlot0(dc,x,y);
GrPlot0(dc,x,y);
dc->depth_buf=db;
return TRUE;
}
@@ -94,15 +96,15 @@ Bool GrPlot1(CDC *dc=gr.dc,I64 x,I64 y)
x+=win_task->pix_left+win_task->scroll_x;
y+=win_task->pix_top+win_task->scroll_y;
if (win_task->pix_left<=x<=win_task->pix_right &&
win_task->pix_top <=y<=win_task->pix_bottom &&
0<=x<dc->width && 0<=y<dc->height &&
(win_task->next_task==sys_winmgr_task ||
dc->flags&DCF_ON_TOP ||
!IsPixCovered0(win_task,x,y)))
win_task->pix_top <=y<=win_task->pix_bottom &&
0<=x<dc->width && 0<=y<dc->height &&
(win_task->next_task==sys_winmgr_task ||
dc->flags&DCF_ON_TOP ||
!IsPixCovered0(win_task,x,y)))
GrPlot0(dc,x,y);
} else
if (0<=x<dc->width && 0<=y<dc->height)
GrPlot0(dc,x,y);
GrPlot0(dc,x,y);
return TRUE;
}
@@ -115,15 +117,15 @@ public I64 GrPeek(CDC *dc=gr.dc,I64 x,I64 y)
x+=win_task->pix_left+win_task->scroll_x;
y+=win_task->pix_top+win_task->scroll_y;
if (!(win_task->pix_left<=x<=win_task->pix_right) ||
!(win_task->pix_top <=y<=win_task->pix_bottom) ||
!(0<=x<dc->width) || !(0<=y<dc->height) ||
win_task->next_task!=sys_winmgr_task &&
!(dc->flags&DCF_ON_TOP) &&
IsPixCovered0(win_task,x,y))
!(win_task->pix_top <=y<=win_task->pix_bottom) ||
!(0<=x<dc->width) || !(0<=y<dc->height) ||
win_task->next_task!=sys_winmgr_task &&
!(dc->flags&DCF_ON_TOP) &&
IsPixCovered0(win_task,x,y))
return -1;
} else
if (!(0<=x<dc->width) || !(0<=y<dc->height))
return -1;
return -1;
return GrPeek0(dc,x,y);
}
@@ -171,7 +173,7 @@ I64 GrFloodFillRay(CDC *dc,I64 x,I64 y,I64 z,I32 *db)
//Returns cnt of pixs changed
I64 result=0;
//We don't dynamically calculate the size to avoid
//fragmentation of memory.
//fragmentation of memory.
CFFRay *f_dc=MAlloc(sizeof(CFFRay)*0x80000),*f=f_dc;
f->x=x;
f->y=y;
@@ -234,11 +236,12 @@ I64 GrFloodFillRay(CDC *dc,I64 x,I64 y,I64 z,I32 *db)
return result;
}
public I64 GrFloodFill(CDC *dc=gr.dc,I64 x,I64 y,Bool not_color=FALSE,I64 z=0,I32 *db=NULL)
public I64 GrFloodFill(CDC *dc=gr.dc,I64 x,I64 y,
Bool not_color=FALSE,I64 z=0,I32 *db=NULL)
{//2D. Ignore z and db.
//not_color=TRUE means fill up to everything which is not the current color.
//not_color=FALSE means fill all parts equal to the color under the point.
//Returns cnt of pixs changed
//not_color=FALSE means fill all parts equal to the color under the point.
//Returns cnt of pixs changed
I64 result=0,j,old_flags=dc->flags;
CColorROPU32 old_color2=dc->color2;
CDC *old_brush;
@@ -254,14 +257,14 @@ public I64 GrFloodFill(CDC *dc=gr.dc,I64 x,I64 y,Bool not_color=FALSE,I64 z=0,I3
dc->color2=j;
if (dc->color.c1.rop&ROPBF_DITHER) {
if (dc->color2.c0.color==dc->color.c0.color &&
dc->color.c0.color==dc->color.c1.color)
dc->color.c0.color==dc->color.c1.color)
goto ff_done;
} else if (dc->color2.c0.color==dc->color.c0.color)
goto ff_done;
dc->flags&=~DCF_FILL_NOT_COLOR;
}
if (not_color && j!=dc->color2 ||
!not_color)
!not_color)
result=GrFloodFillRay(dc,x,y,z,db);
}
ff_done:
@@ -282,7 +285,7 @@ public Bool GrPlot3B(CDC *dc=gr.dc,I64 x,I64 y,I64 z)
}
if (dc->flags & DCF_SYMMETRY) {
_x=x; _y=y; _z=z;
GrReflect(dc,&_x,&_y,&_z);
DCReflect(dc,&_x,&_y,&_z);
dc->flags&=~DCF_SYMMETRY;
dc->db_z=_z;
GrPlot1(dc,_x,_y);
@@ -302,7 +305,7 @@ gr_done:
public Bool GrPlot3(CDC *dc=gr.dc,I64 x,I64 y,I64 z)
{//3D. Clipping and transformation and pen width.
I64 _x,_y,_z,i,j,w,dist;
I64 _x,_y,_z,i,j,w;
CColorROPU32 old_color=dc->color;
Bool record,was_transform=FALSE,was_symmetry=FALSE;
CTask *win_task;
@@ -313,7 +316,7 @@ public Bool GrPlot3(CDC *dc=gr.dc,I64 x,I64 y,I64 z)
}
if (dc->flags & DCF_SYMMETRY) {
_x=x; _y=y; _z=z;
GrReflect(dc,&_x,&_y,&_z);
DCReflect(dc,&_x,&_y,&_z);
dc->flags&=~DCF_SYMMETRY;
GrPlot3(dc,_x,_y,_z);
was_symmetry=TRUE;
@@ -341,8 +344,10 @@ public Bool GrPlot3(CDC *dc=gr.dc,I64 x,I64 y,I64 z)
}
} else {
if (dc->color.c0.rop==ROPB_COLLISION) {
if (dc->color.c0.color!=dc->bkcolor.c0.color && dc->color.c0.color!=TRANSPARENT)
record=GrBlot3(dc,x-w,y-w,z,gr.collision_pen_brushes[dc->pen_width]);
if (dc->color.c0.color!=dc->bkcolor.c0.color &&
dc->color.c0.color!=TRANSPARENT)
record=GrBlot3(dc,x-w,y-w,z,
gr.collision_pen_brushes[dc->pen_width]);
else
record=FALSE;
} else
@@ -362,7 +367,8 @@ public Bool GrPlot3(CDC *dc=gr.dc,I64 x,I64 y,I64 z)
}
} else {
if (dc->color.c0.rop==ROPB_COLLISION) {
if (dc->color.c0.color!=dc->bkcolor.c0.color && dc->color.c0.color!=TRANSPARENT)
if (dc->color.c0.color!=dc->bkcolor.c0.color &&
dc->color.c0.color!=TRANSPARENT)
record=GrBlot(dc,x-w,y-w,gr.collision_pen_brushes[dc->pen_width]);
else
record=FALSE;
@@ -376,13 +382,8 @@ public Bool GrPlot3(CDC *dc=gr.dc,I64 x,I64 y,I64 z)
x+=win_task->pix_left+win_task->scroll_x;
y+=win_task->pix_top+win_task->scroll_y;
}
if (dc->flags & DCF_LOCATE_NEAREST) {
dist=DistSqrI64(x,y,dc->cur_x,dc->cur_y);
if (dist<dc->nearest_dist) {
dc->nearest_sprite_elem_num=dc->cur_sprite_elem_num;
dc->nearest_dist=dist;
}
}
if (dc->flags & DCF_LOCATE_NEAREST)
dc->dist=DistSqrI64(x,y,dc->cur_x,dc->cur_y);
if (dc->flags & DCF_RECORD_EXTENTS) {
if (x-w<dc->min_x) dc->min_x=x-w;
if (y-w<dc->min_y) dc->min_y=y-w;
@@ -417,9 +418,9 @@ Bool GrLinePlot0(CDC *dc,I64 x,I64 y,I64 z)
{//This is a callback.
CTask *win_task=dc->win_task;
if (!(dc->flags & DCF_SCREEN_BITMAP) ||
win_task->next_task==sys_winmgr_task ||
dc->flags&DCF_ON_TOP ||
!IsPixCovered0(win_task,x,y)) {
win_task->next_task==sys_winmgr_task ||
dc->flags&DCF_ON_TOP ||
!IsPixCovered0(win_task,x,y)) {
dc->db_z=z;
GrPlot0(dc,x,y);
}
@@ -433,7 +434,8 @@ Bool GrLinePlot(CDC *dc,I64 x,I64 y,I64 z)
return TRUE;
}
public Bool GrLine(CDC *dc=gr.dc,I64 x1,I64 y1,I64 x2,I64 y2,I64 step=1,I64 start=0)
public Bool GrLine(CDC *dc=gr.dc,I64 x1,I64 y1,I64 x2,I64 y2,
I64 step=1,I64 start=0)
{//2D. Clipping but not transformation.
Bool result=FALSE;
I32 *db=dc->depth_buf;
@@ -469,7 +471,8 @@ public Bool GrEllipse(CDC *dc=gr.dc,
Bool result;
I32 *db=dc->depth_buf;
dc->depth_buf=NULL;
result=Ellipse(dc,cx,cy,0,x_radius,y_radius,&GrLinePlot,rot_angle,step,start_radians,len_radians);
result=Ellipse(dc,cx,cy,0,x_radius,y_radius,&GrLinePlot,
rot_angle,step,start_radians,len_radians);
dc->depth_buf=db;
return result;
}
@@ -486,7 +489,7 @@ public Bool GrRegPoly(CDC *dc=gr.dc,
I32 *db=dc->depth_buf;
dc->depth_buf=NULL;
result=RegPoly(dc,cx,cy,0,x_radius,y_radius,sides,
&GrLinePlot,rot_angle,step,start_radians,len_radians);
&GrLinePlot,rot_angle,step,start_radians,len_radians);
dc->depth_buf=db;
return result;
}
@@ -511,7 +514,8 @@ public Bool Gr3BSpline(CDC *dc=gr.dc,CD3I32 *ctrl,I64 cnt,Bool closed=FALSE)
return BSpline3(dc,ctrl,cnt,&GrLinePlot,closed);
}
public Bool GrLine3(CDC *dc=gr.dc,I64 x1,I64 y1,I64 z1,I64 x2,I64 y2,I64 z2,I64 step=1,I64 start=0)
public Bool GrLine3(CDC *dc=gr.dc,I64 x1,I64 y1,I64 z1,I64 x2,I64 y2,I64 z2,
I64 step=1,I64 start=0)
{//3D. Transformation with pen width.
I64 _x1,_y1,_z1,_x2,_y2,_z2;
Bool result=FALSE,was_transform=FALSE,was_symmetry=FALSE;
@@ -523,11 +527,12 @@ public Bool GrLine3(CDC *dc=gr.dc,I64 x1,I64 y1,I64 z1,I64 x2,I64 y2,I64 z2,I64
}
if (dc->flags & DCF_SYMMETRY) {
_x1=x1; _y1=y1; _z1=z1;
GrReflect(dc,&_x1,&_y1,&_z1);
DCReflect(dc,&_x1,&_y1,&_z1);
_x2=x2; _y2=y2; _z2=z2;
GrReflect(dc,&_x2,&_y2,&_z2);
DCReflect(dc,&_x2,&_y2,&_z2);
dc->flags&=~DCF_SYMMETRY;
if (step==1 && !start && !dc->brush && dc->pen_width<2 && !dc->depth_buf) {//TODO: clip z for depth buf
if (step==1 && !start && !dc->brush && dc->pen_width<2 &&
!dc->depth_buf) {//TODO: clip z for depth buf
if (DCClipLine(dc,&_x1,&_y1,&_x2,&_y2))
result=Line(dc,_x1,_y1,0,_x2,_y2,0,&GrLinePlot0,step,start);
} else
@@ -536,7 +541,8 @@ public Bool GrLine3(CDC *dc=gr.dc,I64 x1,I64 y1,I64 z1,I64 x2,I64 y2,I64 z2,I64
if (dc->flags&DCF_JUST_MIRROR)
goto gr_done;
}
if (step==1 && !start && !dc->brush && dc->pen_width<2 && !dc->depth_buf) {//TODO: clip z for depth buf
if (step==1 && !start && !dc->brush && dc->pen_width<2 &&
!dc->depth_buf) {//TODO: clip z for depth buf
if (DCClipLine(dc,&x1,&y1,&x2,&y2))
result|=Line(dc,x1,y1,0,x2,y2,0,&GrLinePlot0,step,start);
} else
@@ -628,10 +634,11 @@ public Bool GrEllipse3(CDC *dc=gr.dc,
m2*=Abs(Sin(a2-a1));
result=Ellipse(dc,cx,cy,cz,
m1/0x10000,m2/0x10000,&GrPlot3,-a1,step,start_radians,len_radians);
m1/0x10000,m2/0x10000,&GrPlot3,-a1,step,start_radians,len_radians);
dc->flags|=DCF_TRANSFORMATION;
} else
result=Ellipse(dc,cx,cy,cz,x_radius,y_radius,&GrPlot3,rot_angle,step,start_radians,len_radians);
result=Ellipse(dc,cx,cy,cz,x_radius,y_radius,&GrPlot3,
rot_angle,step,start_radians,len_radians);
return result;
}
@@ -639,9 +646,11 @@ public Bool GrCircle3(CDC *dc=gr.dc,I64 cx,I64 cy,I64 cz,I64 radius,
I64 step=1,F64 start_radians=0,F64 len_radians=2*ã)
{//3D. Transformation with pen width.
if (dc->flags & DCF_TRANSFORMATION)
return GrEllipse3(dc,cx,cy,cz,radius,radius,0,step,start_radians,len_radians);
return GrEllipse3(dc,cx,cy,cz,radius,radius,0,step,
start_radians,len_radians);
else
return Circle(dc,cx,cy,cz,radius,&GrPlot3,step,start_radians,len_radians);
return Circle(dc,cx,cy,cz,radius,&GrPlot3,step,
start_radians,len_radians);
}
public Bool GrRegPoly3(CDC *dc=gr.dc,
@@ -690,27 +699,29 @@ public Bool GrRegPoly3(CDC *dc=gr.dc,
m2*=Abs(Sin(a2-a1));
result=RegPoly(dc,cx,cy,cz,
m1/0x10000,m2/0x10000,sides,&GrPlot3,-a1,step,start_radians,len_radians);
m1/0x10000,m2/0x10000,sides,&GrPlot3,-a1,
step,start_radians,len_radians);
dc->flags|=DCF_TRANSFORMATION;
} else
result=RegPoly(dc,cx,cy,cz,x_radius,y_radius,sides,&GrPlot3,rot_angle,step,start_radians,len_radians);
result=RegPoly(dc,cx,cy,cz,x_radius,y_radius,sides,&GrPlot3,
rot_angle,step,start_radians,len_radians);
return result;
}
public I64 GrFloodFill3(CDC *dc=gr.dc,I64 x1,I64 y1,I64 z1,Bool not_color=FALSE)
{//3D. Transformation.
//not_color=TRUE means fill up to everything which is not the current color.
//not_color=FALSE means fill all parts equal to the color under the point.
//Returns cnt of pixs changed
//not_color=FALSE means fill all parts equal to the color under the point.
//Returns cnt of pixs changed
I64 result,old_flags=dc->flags,
_x,_y,_z;
_x,_y,_z;
if (dc->flags & DCF_TRANSFORMATION) {
(*dc->transform)(dc,&x1,&y1,&z1);
dc->flags&=~DCF_TRANSFORMATION;
}
if (dc->flags & DCF_SYMMETRY) {
_x=x1; _y=y1; _z=z1;
GrReflect(dc,&_x,&_y,&_z);
DCReflect(dc,&_x,&_y,&_z);
dc->flags&=~DCF_SYMMETRY;
result=GrFloodFill(dc,_x,_y,not_color,_z,dc->depth_buf);
if (dc->flags&DCF_JUST_MIRROR)
@@ -725,16 +736,16 @@ gr_done:
#help_index "Graphics;Graphics/Device Contexts"
public I64 GrBlot3(CDC *dc=gr.dc,I64 x1,I64 y1,I64 z1,CDC *img)
{//3D. Clipping and transformation. Uses $LK,"fixed-point",A="FI:::/Demo/Lectures/FixedPoint.CPP"$.
{//3D. Clipping and transformation.
CColorROPU32 old_color=dc->color;
I64 color,reg i,j,w=img->width,h=img->height,
d1,dx1,dy1,dz1,
reg d2,dx2,dy2,dz2,
adx1,ady1,adz1,
adx2,ady2,adz2,
x2,y2,z2,x3,y3,z3,
dw,reg dh,x,y,_x1,_y1,_z1,_x2,_y2,_z2,_x3,_y3,_z3,
last_x,last_y,result=0;
d1,dx1,dy1,dz1,
reg d2,dx2,dy2,dz2,
adx1,ady1,adz1,
adx2,ady2,adz2,
x2,y2,z2,x3,y3,z3,
dw,reg dh,x,y,_x1,_y1,_z1,_x2,_y2,_z2,_x3,_y3,_z3,
last_x,last_y,result=0;
Bool first;
CDC *old_brush=dc->brush;
@@ -748,11 +759,11 @@ public I64 GrBlot3(CDC *dc=gr.dc,I64 x1,I64 y1,I64 z1,CDC *img)
}
if (dc->flags & DCF_SYMMETRY) {
_x1=x1; _y1=y1; _z1=z1;
GrReflect(dc,&_x1,&_y1,&_z1);
DCReflect(dc,&_x1,&_y1,&_z1);
_x2=x2; _y2=y2; _z2=z2;
GrReflect(dc,&_x2,&_y2,&_z2);
DCReflect(dc,&_x2,&_y2,&_z2);
_x3=x3; _y3=y3; _z3=z3;
GrReflect(dc,&_x3,&_y3,&_z3);
DCReflect(dc,&_x3,&_y3,&_z3);
dx1=_x2-_x1; dy1=_y2-_y1; dz1=_z2-_z1;
dx2=_x3-_x1; dy2=_y3-_y1; dz2=_z3-_z1;
adx1=AbsI64(dx1); ady1=AbsI64(dy1); adz1=AbsI64(dz1);
@@ -944,7 +955,7 @@ public Bool Gr2Bezier3(CDC *dc=gr.dc,CD3I32 *ctrl)
{//2nd order. Clipping and transform and pen width.
Bool result=FALSE;
I64 i,x,y,z,
old_flags=dc->flags;
old_flags=dc->flags;
CD3I32 *ctrl2=NULL,*ctrl3=NULL;
if (dc->flags & DCF_TRANSFORMATION) {
ctrl2=MAlloc(sizeof(CD3I32)*3);
@@ -966,7 +977,7 @@ public Bool Gr2Bezier3(CDC *dc=gr.dc,CD3I32 *ctrl)
x=ctrl[i].x;
y=ctrl[i].y;
z=ctrl[i].z;
GrReflect(dc,&x,&y,&z);
DCReflect(dc,&x,&y,&z);
ctrl3[i].x=x;
ctrl3[i].y=y;
ctrl3[i].z=z;
@@ -989,7 +1000,7 @@ public Bool Gr3Bezier3(CDC *dc=gr.dc,CD3I32 *ctrl)
{//3rd order. Clipping and transform and pen width.
Bool result=FALSE;
I64 i,x,y,z,
old_flags=dc->flags;
old_flags=dc->flags;
CD3I32 *ctrl2=NULL,*ctrl3=NULL;
if (dc->flags & DCF_TRANSFORMATION) {
ctrl2=MAlloc(sizeof(CD3I32)*4);
@@ -1011,7 +1022,7 @@ public Bool Gr3Bezier3(CDC *dc=gr.dc,CD3I32 *ctrl)
x=ctrl[i].x;
y=ctrl[i].y;
z=ctrl[i].z;
GrReflect(dc,&x,&y,&z);
DCReflect(dc,&x,&y,&z);
ctrl3[i].x=x;
ctrl3[i].y=y;
ctrl3[i].z=z;
@@ -1034,7 +1045,7 @@ public I64 Gr2BSpline3(CDC *dc=gr.dc,CD3I32 *ctrl,I64 cnt,Bool closed=FALSE)
{//2nd order. Clipping and transform and pen width.
Bool result=FALSE;
I64 i,x,y,z,
old_flags=dc->flags;
old_flags=dc->flags;
CD3I32 *ctrl2=NULL,*ctrl3=NULL;
if (dc->flags & DCF_TRANSFORMATION) {
ctrl2=MAlloc(sizeof(CD3I32)*cnt);
@@ -1056,7 +1067,7 @@ public I64 Gr2BSpline3(CDC *dc=gr.dc,CD3I32 *ctrl,I64 cnt,Bool closed=FALSE)
x=ctrl[i].x;
y=ctrl[i].y;
z=ctrl[i].z;
GrReflect(dc,&x,&y,&z);
DCReflect(dc,&x,&y,&z);
ctrl3[i].x=x;
ctrl3[i].y=y;
ctrl3[i].z=z;
@@ -1079,7 +1090,7 @@ public Bool Gr3BSpline3(CDC *dc=gr.dc,CD3I32 *ctrl,I64 cnt,Bool closed=FALSE)
{//3rd order. Clipping and transform and pen width.
Bool result=FALSE;
I64 i,x,y,z,
old_flags=dc->flags;
old_flags=dc->flags;
CD3I32 *ctrl2=NULL,*ctrl3=NULL;
if (dc->flags & DCF_TRANSFORMATION) {
ctrl2=MAlloc(sizeof(CD3I32)*cnt);
@@ -1101,7 +1112,7 @@ public Bool Gr3BSpline3(CDC *dc=gr.dc,CD3I32 *ctrl,I64 cnt,Bool closed=FALSE)
x=ctrl[i].x;
y=ctrl[i].y;
z=ctrl[i].z;
GrReflect(dc,&x,&y,&z);
DCReflect(dc,&x,&y,&z);
ctrl3[i].x=x;
ctrl3[i].y=y;
ctrl3[i].z=z;
@@ -1121,17 +1132,16 @@ gr_done:
}
public I64 GrFillTri0(CDC *dc=gr.dc,CD3I32 *p1,CD3I32 *p2,CD3I32 *p4)
{//3D. Uses $LK,"fixed-point",A="FI:::/Demo/Lectures/FixedPoint.CPP"$.
//Returns cnt of pixs changed
{//3D. Returns cnt of pixs changed
I64 x1,x2,y,z1,z2,dx1,dy1,dz1,dx2,dy2,dz2,result=0,i,y_min,y_max;
CTask *win_task;
//p1 is min x
//p1 is min x
if (p4->x<p2->x)
SwapI64(&p4,&p2);
if (p2->x<p1->x)
SwapI64(&p2,&p1);
//p2y<=p4y
//p2y<=p4y
if (p4->y<p2->y)
SwapI64(&p4,&p2);