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restore til I understand what changed

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Change-Id: I58abeb7405cdefe6d9882b7c9977e051143fcb67
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/266716
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
This commit is contained in:
Mike Reed 2020-01-25 20:37:15 -05:00 committed by Skia Commit-Bot
parent 00a9764319
commit db301b73f8
1 changed files with 15 additions and 2 deletions
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17
gm/crbug_224618.cpp
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@ -8,9 +8,22 @@
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkMatrix44.h"
#include "include/private/SkM44.h"
#include "tools/timer/TimeUtils.h"
static SkM44 rotate_axis_angle(SkScalar x, SkScalar y, SkScalar z, SkScalar radians) {
// SkM44 doesn't expose any rotation factories yet
SkMatrix44 m;
m.setRotateAboutUnit(x, y, z, radians);
float a[16];
m.asColMajorf(a);
SkM44 m4;
m4.setColMajor(a);
return m4;
}
// Adapted from https://codepen.io/adamdupuis/pen/qLYzqB
class CrBug224618GM : public skiagm::GM {
public:
@ -42,7 +55,7 @@ protected:
0.f, 0.f, -1.f / radius, 1.f};
SkM44 zoom = SkM44::Translate(0.f, 0.f, radius);
SkM44 postZoom = SkM44::Translate(0.f, 0.f, -radius - 1.f);
SkM44 rotateHorizontal = SkM44::Rotate({0, 1, 0}, 2.356194490192345f);
SkM44 rotateHorizontal = rotate_axis_angle(0.f, 1.f, 0.f, 2.356194490192345f);
// w in degrees will need to be converted to radians
SkV4 axisAngles[6] = {
@ -62,7 +75,7 @@ protected:
SkColorSetARGB(0xFF, 0x80, 0x00, 0x80) // purple css
};
for (int i = 0; i < 6; ++i) {
SkM44 model = SkM44::Rotate({axisAngles[i].x, axisAngles[i].y, axisAngles[i].z},
SkM44 model = rotate_axis_angle(axisAngles[i].x, axisAngles[i].y, axisAngles[i].z,
SkDegreesToRadians(axisAngles[i].w));
model = SkM44::Translate(radius, radius) * proj * // project and place content
zoom * rotateHorizontal * model * postZoom * // main model matrix