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Merge pull request #67 from hamoid/linearGradientExpo

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Add LinearGradient exponent
This commit is contained in:
Edwin Jakobs
2020-04-07 15:36:35 +02:00
committed by GitHub
parent 957ba03b9b 43d44cc895
commit 9200519672
1 changed files with 16 additions and 9 deletions
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23
orx-shade-styles/src/main/kotlin/LinearGradient.kt
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@@ -2,7 +2,6 @@ package org.openrndr.extra.shadestyles
import org.openrndr.color.ColorRGBa
import org.openrndr.draw.ShadeStyle
import org.openrndr.draw.shadeStyle
import org.openrndr.extra.parameters.ColorParameter
import org.openrndr.extra.parameters.Description
import org.openrndr.extra.parameters.DoubleParameter
@@ -13,7 +12,8 @@ class LinearGradient(
color0: ColorRGBa,
color1: ColorRGBa,
offset: Vector2,
rotation: Double) : ShadeStyle() {
rotation: Double,
exponent: Double) : ShadeStyle() {
@ColorParameter("start color", order = 0)
var color0: ColorRGBa by Parameter()
@@ -22,12 +22,15 @@ class LinearGradient(
var offset: Vector2 by Parameter()
@DoubleParameter("rotation", -180.0, 180.0, order = 2)
var rotation: Double by Parameter()
@DoubleParameter("exponent", 0.01, 10.0, order = 3)
var exponent: Double by Parameter()
init {
this.color0 = color0
this.color1 = color1
this.offset = offset
this.rotation = rotation
this.exponent = exponent
fragmentTransform = """
vec2 coord = (c_boundsPosition.xy - vec2(0.5) + p_offset);
@@ -36,23 +39,27 @@ class LinearGradient(
mat2 rm = mat2(cr, -sr, sr, cr);
float f = clamp((rm * coord).y + 0.5, 0.0, 1.0);
vec4 color0 = p_color0 * vec4(p_color0.aaa, 1.0);
vec4 color1 = p_color1 * vec4(p_color1.aaa, 1.0);
vec4 color0 = p_color0;
color0.rgb *= color0.a;
vec4 gradient = color0 * (1.0-f) + color1 * f;
vec4 color1 = p_color1;
color1.rgb *= color1.a;
vec4 gradient = mix(color0, color1, pow(f, p_exponent));
vec4 fn = vec4(x_fill.rgb, 1.0) * x_fill.a;
x_fill = fn * gradient;
if (x_fill.a !=0) {
if (x_fill.a != 0) {
x_fill.rgb /= x_fill.a;
}
"""
}
}
fun linearGradient(color0: ColorRGBa, color1: ColorRGBa, offset: Vector2 = Vector2.ZERO, rotation: Double = 0.0) =
LinearGradient(color0, color1, offset, rotation)
fun linearGradient(color0: ColorRGBa, color1: ColorRGBa, offset: Vector2 =
Vector2.ZERO, rotation: Double = 0.0, exponent: Double = 1.0) =
LinearGradient(color0, color1, offset, rotation, exponent)