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Debug draw: Added squircle shape.

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This commit is contained in:
Branimir Karadžić 2016-03-06 00:07:20 -08:00
parent c1642d46d1
commit 67d36dc9a9
2 changed files with 62 additions and 20 deletions
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78
examples/common/debugdraw/debugdraw.cpp
View File

@ -97,6 +97,22 @@ static uint8_t getCircleLod(uint8_t _lod)
return s_circleLod[_lod];
}
static void circle(float* _out, float _angle)
{
float sa = bx::fsin(_angle);
float ca = bx::fcos(_angle);
_out[0] = sa;
_out[1] = ca;
}
static void squircle(float* _out, float _angle)
{
float sa = bx::fsin(_angle);
float ca = bx::fcos(_angle);
_out[0] = bx::fsqrt(bx::fabsolute(sa) ) * bx::fsign(sa);
_out[1] = bx::fsqrt(bx::fabsolute(ca) ) * bx::fsign(ca);
}
uint32_t genSphere(uint8_t _subdiv0, void* _pos0 = NULL, uint16_t _posStride0 = 0, void* _normals0 = NULL, uint16_t _normalStride0 = 0)
{
if (NULL != _pos0)
@ -910,11 +926,12 @@ struct DebugDraw
lineTo(_x, _y, _z);
}
void drawCircle(const float* _normal, const float* _center, float _radius)
void drawCircle(const float* _normal, const float* _center, float _radius, float _weight = 0.0f)
{
const Attrib& attrib = m_attrib[m_stack];
const uint32_t num = getCircleLod(attrib.m_lod);
const float step = bx::pi * 2.0f / num;
_weight = bx::fclamp(_weight, 0.0f, 2.0f);
Plane plane = { { _normal[0], _normal[1], _normal[2] }, 0.0f };
float udir[3];
@ -922,45 +939,70 @@ struct DebugDraw
calcPlaneUv(plane, udir, vdir);
float pos[3];
bx::vec3Add(pos, vdir, _center);
float tmp0[3];
float tmp1[3];
float xy0[2];
float xy1[2];
circle(xy0, 0.0f);
squircle(xy1, 0.0f);
bx::vec3Mul(pos, udir, bx::flerp(xy0[0], xy1[0], _weight)*_radius);
bx::vec3Mul(tmp0, vdir, bx::flerp(xy0[1], xy1[1], _weight)*_radius);
bx::vec3Add(tmp1, pos, tmp0);
bx::vec3Add(pos, tmp1, _center);
moveTo(pos);
for (uint32_t ii = 1; ii < num; ++ii)
{
float tmp0[3];
float tmp1[3];
bx::vec3Mul(pos, udir, bx::fsin(step * ii)*_radius);
bx::vec3Mul(tmp0, vdir, bx::fcos(step * ii)*_radius);
float angle = step * ii;
circle(xy0, angle);
squircle(xy1, angle);
bx::vec3Mul(pos, udir, bx::flerp(xy0[0], xy1[0], _weight)*_radius);
bx::vec3Mul(tmp0, vdir, bx::flerp(xy0[1], xy1[1], _weight)*_radius);
bx::vec3Add(tmp1, pos, tmp0);
bx::vec3Add(pos, tmp1, _center);
lineTo(pos);
}
close();
}
void drawCircle(const void* _normal, const void* _center, float _radius)
void drawCircle(const void* _normal, const void* _center, float _radius, float _weight = 0.0f)
{
drawCircle( (const float*)_normal, (const float*)_center, _radius);
drawCircle( (const float*)_normal, (const float*)_center, _radius, _weight);
}
void drawCircle(Axis::Enum _axis, float _x, float _y, float _z, float _radius)
void drawCircle(Axis::Enum _axis, float _x, float _y, float _z, float _radius, float _weight = 0.0f)
{
const Attrib& attrib = m_attrib[m_stack];
const uint32_t num = getCircleLod(attrib.m_lod);
const float step = bx::pi * 2.0f / num;
_weight = bx::fclamp(_weight, 0.0f, 2.0f);
float xy0[2];
float xy1[2];
circle(xy0, 0.0f);
squircle(xy1, 0.0f);
float pos[3];
getPoint(pos, _axis
, bx::fsin(step * 0)*_radius
, bx::fcos(step * 0)*_radius
, bx::flerp(xy0[0], xy1[0], _weight)*_radius
, bx::flerp(xy0[1], xy1[1], _weight)*_radius
);
moveTo(pos[0] + _x, pos[1] + _y, pos[2] + _z);
for (uint32_t ii = 1; ii < num; ++ii)
{
float angle = step * ii;
circle(xy0, angle);
squircle(xy1, angle);
getPoint(pos, _axis
, bx::fsin(step * ii)*_radius
, bx::fcos(step * ii)*_radius
);
, bx::flerp(xy0[0], xy1[0], _weight)*_radius
, bx::flerp(xy0[1], xy1[1], _weight)*_radius
);
lineTo(pos[0] + _x, pos[1] + _y, pos[2] + _z);
}
close();
@ -1417,14 +1459,14 @@ void ddDrawArc(Axis::Enum _axis, float _x, float _y, float _z, float _radius, fl
s_dd.drawArc(_axis, _x, _y, _z, _radius, _degrees);
}
void ddDrawCircle(const void* _normal, const void* _center, float _radius)
void ddDrawCircle(const void* _normal, const void* _center, float _radius, float _weight)
{
s_dd.drawCircle(_normal, _center, _radius);
s_dd.drawCircle(_normal, _center, _radius, _weight);
}
void ddDrawCircle(Axis::Enum _axis, float _x, float _y, float _z, float _radius)
void ddDrawCircle(Axis::Enum _axis, float _x, float _y, float _z, float _radius, float _weight)
{
s_dd.drawCircle(_axis, _x, _y, _z, _radius);
s_dd.drawCircle(_axis, _x, _y, _z, _radius, _weight);
}
void ddDrawAxis(float _x, float _y, float _z, float _len, Axis::Enum _hightlight)

4
examples/common/debugdraw/debugdraw.h
View File

@ -97,10 +97,10 @@ void ddDrawFrustum(const void* _viewProj);
void ddDrawArc(Axis::Enum _axis, float _x, float _y, float _z, float _radius, float _degrees);
///
void ddDrawCircle(const void* _normal, const void* _center, float _radius);
void ddDrawCircle(const void* _normal, const void* _center, float _radius, float _weight = 0.0f);
///
void ddDrawCircle(Axis::Enum _axis, float _x, float _y, float _z, float _radius);
void ddDrawCircle(Axis::Enum _axis, float _x, float _y, float _z, float _radius, float _weight = 0.0f);
///
void ddDrawAxis(float _x, float _y, float _z, float _len = 1.0f, Axis::Enum _highlight = Axis::Count);