3d.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkData.h"
#include "include/core/SkPicture.h"
#include "include/core/SkPictureRecorder.h"
#include <cmath>

Go to the source code of this file.

Classes
struct	Info

Functions
static SkM44	inv (const SkM44 &m)
static SkM44	make_ctm (const Info &info, const SkM44 &model, SkSize size)
static void	do_draw (SkCanvas *canvas, SkColor color)
	DEF_SIMPLE_GM (sk3d_simple, real_canvas, 300, 300)

Function Documentation

DEF_SIMPLE_GM()

DEF_SIMPLE_GM	(	sk3d_simple	,
		real_canvas	,
		300	,
		300
	)

Definition at line 65 of file 3d.cpp.

                                                  {
    do_draw(real_canvas, 0xFFFF0000);
 
    SkPictureRecorder recorder;
    SkCanvas* canvas = recorder.beginRecording(300, 300);
 
    do_draw(canvas, 0x880000FF);
 
    auto pic = recorder.finishRecordingAsPicture();
    real_canvas->drawPicture(pic);
}

do_draw()

static void do_draw ( SkCanvas *  canvas, SkColor  color  )

static

Definition at line 47 of file 3d.cpp.

                                                     {
    SkAutoCanvasRestore acr(canvas, true);
 
    Info info;
 
    SkM44 m = SkM44::Rotate({0, 1, 0}, SK_ScalarPI/6);
 
    canvas->concat(make_ctm(info, m, {300, 300}));
 
    canvas->translate(150, 150);
    SkPaint paint;
    paint.setColor(color);
    canvas->drawRect({-100, -100, 100, 100}, paint);
}

inv()

static SkM44 inv ( const SkM44 &  m )

static

Definition at line 26 of file 3d.cpp.

                                 {
    SkM44 inverse(SkM44::kUninitialized_Constructor);
    if (!m.invert(&inverse)) {
        inverse.setIdentity();
    }
    return inverse;
}

make_ctm()

static SkM44 make_ctm ( const Info &  info, const SkM44 &  model, SkSize  size  )

static

Definition at line 34 of file 3d.cpp.

                                                                         {
    SkM44  camera, perspective, viewport;
 
    SkScalar w = size.width();
    SkScalar h = size.height();
 
    perspective = SkM44::Perspective(info.fNear, info.fFar, info.fAngle);
    camera = SkM44::LookAt(info.fEye, info.fCOA, info.fUp);
    viewport.setScale(w*0.5f, h*0.5f, 1);//.postTranslate(r.centerX(), r.centerY(), 0);
 
    return viewport * perspective * camera * model * inv(viewport);
}