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GUI: colors

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tildearrow 2022-06-22 15:10:53 -05:00
parent 8dc143af7b
commit 4731dad917
4 changed files with 268 additions and 134 deletions
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16
src/gui/gradient.cpp
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@ -21,6 +21,16 @@
#include "imgui.h"
#include <math.h>
ImU32 Gradient2D::get(float x, float y) {
int xi=round(x*width);
int yi=round(y*height);
if (xi<0) xi=0;
if (xi>=(int)width) xi=width-1;
if (yi<0) yi=0;
if (yi>=(int)height) yi=height-1;
return grad[yi*width+xi];
}
void Gradient2D::render() {
ImU32* g=grad.get();
ImU32 bgColorU=ImGui::ColorConvertFloat4ToU32(bgColor);
@ -33,18 +43,18 @@ void Gradient2D::render() {
// 2. insert points
for (Gradient2DPoint& i: points) {
float pDistSquared=i.distance*i.distance;
printf("shading this point %f %f\n",i.x,i.y);
for (size_t j=0; j<height; j++) {
float jFloat=(float)j/(float)height;
float distY=jFloat-i.y;
for (size_t k=0; k<width; k++) {
float kFloat=(float)k/(float)width;
float distX=kFloat-i.x;
float distSquared=(distX*distX)+(distY*distY);
float distSquared=(distX*distX)+(distY*distY)-(i.spread*i.spread);
if (distSquared<0) distSquared=0;
if (distSquared>=pDistSquared) continue;
float dist=(1.0-(sqrt(distSquared)/i.distance))-i.spread;
float dist=(1.0-(sqrt(distSquared)/i.distance));
if (dist<0) dist=0;
if (dist>1) dist=1;