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radial fix

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This commit is contained in:
danya
2021-04-22 15:37:50 +03:00
parent 9f7f51fc82
commit 72d9418fd5
3 changed files with 57 additions and 17 deletions
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62
DesktopEditor/agg-2.4/include/test_grads/custom_gradients.h
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@ -2,6 +2,7 @@
#include <time.h>
#include <math.h>
#include "../../../graphics/AggPlusEnums.h"
#include "../../../graphics/structures.h"
#ifndef M_1_PI
#define M_1_PI 0.318309886183790671538
#endif
@ -81,15 +82,41 @@ namespace agg
class calcRadial : public calcBase
{
public:
calcRadial(const NSStructures::GradientInfo &_gi)
calcRadial(const NSStructures::GradientInfo &_gi) : extend_to_inf_constant(10)
{
r0 = _gi.r0;
r1 = _gi.r1;
p0 = _gi.p0;
p1 = _gi.p1;
ginfo = _gi;
extend_back_coef = extend_front_coef = 0;
if (ginfo.continue_shading_b)
{
if (r0 < r1)
{
extend_back_coef = r0 / (r1 - r0);
}
else
{
extend_back_coef = extend_to_inf_constant;
}
}
if (ginfo.continue_shading_f)
{
if (r1 < r0)
{
extend_front_coef = r1 / (r0 - r1);
}
else
{
extend_front_coef = extend_to_inf_constant;
}
}
var_segment = 1 / (1 + extend_back_coef + extend_front_coef);
}
virtual float eval(float x, float y) override
@ -117,12 +144,13 @@ namespace agg
{
return NAN_FLOAT;
}
float x1 = (-b + sqrtf(D)) / 2 / a;
float x2 = (-b - sqrtf(D)) / 2 / a;
float x2 = (-b + sqrtf(D)) / 2 / a;
float x1 = (-b - sqrtf(D)) / 2 / a;
if (abs(a) < FLT_EPSILON)
x1 = -c / b;
if (0 <= x1 && x1 <= 1)
{
return ginfo.shading.function.get_x_min() +
@ -133,18 +161,22 @@ namespace agg
return ginfo.shading.function.get_x_min() +
(ginfo.shading.function.get_x_max() - ginfo.shading.function.get_x_min()) * x2;
}
if (ginfo.continue_shading_b)
if (ginfo.continue_shading_b &&
(0 >= x1 && x1 >= -extend_back_coef ||
0 >= x2 && x2 >= -extend_back_coef))
{
if (x1 <= 0 || x2 <= 0)
return ginfo.shading.function.get_x_min();
return ginfo.shading.function.get_x_min();
}
if (ginfo.continue_shading_f)
if (ginfo.continue_shading_f &&
(1 <= x1 && x1 <= 1 + extend_front_coef ||
1 <= x2 && x2 <= 1 + extend_front_coef))
{
if (x1 >= 1 || x2 >= 1)
return ginfo.shading.function.get_x_max();
return ginfo.shading.function.get_x_max();
}
return NAN_FLOAT;
}
virtual ~calcRadial() {}
@ -153,6 +185,10 @@ namespace agg
float r0, r1;
NSStructures::Point p0,p1;
NSStructures::GradientInfo ginfo;
float extend_front_coef, extend_back_coef;
float var_segment;
float extend_to_inf_constant;
};
/**
@ -218,6 +254,8 @@ namespace agg
float cx, cy, factor;
float inverseFactor;
float invXsize, invYsize;
};
/**