map/bubbles.go

package main

import (
	"fmt"
	"image"
	"math/rand"

	"github.com/fogleman/gg"
)

type bubbles map[string](*bubble)

func (b bubbles) draw(x int, y int) *gg.Context {
	dc := gg.NewContext(x, y)
	for key, i := range b {
		px, py := 0, 0
		noCollision := false
		for !noCollision {
			fmt.Printf("===  key: %v\n", key)
			// the nature of pinging for points is that you can always end up with something
			// in between points if one is sufficently large and the other is sufficently small.
			px, py = rand.Intn(x-i.SizeX)+i.SizeX/2, rand.Intn(y-i.SizeY)+i.SizeY/2
			switch { // ping 15 points to verify if an different bubble is beneath this one.
			case !isTransparent(dc.Image(), px-i.SizeX/2, py-i.SizeY/2): //top left
				noCollision = false
			case !isTransparent(dc.Image(), px-i.SizeX/4, py-i.SizeY/4): //top 2/5th
				noCollision = false
			case !isTransparent(dc.Image(), px, py-i.SizeY/2): // top
				noCollision = false
			case !isTransparent(dc.Image(), px+i.SizeX/4, py-i.SizeY/2): //top 4/5th
				noCollision = false
			case !isTransparent(dc.Image(), px+i.SizeX/2, py-i.SizeY/2): //top right
				noCollision = false
			case !isTransparent(dc.Image(), px-i.SizeX/2, py): //center left
				noCollision = false
			case !isTransparent(dc.Image(), px-i.SizeX/4, py): //center 2/5th
				noCollision = false
			case !isTransparent(dc.Image(), px, py): //center
				noCollision = false
			case !isTransparent(dc.Image(), px+i.SizeX/4, py): //center 4/5th
				noCollision = false
			case !isTransparent(dc.Image(), px+i.SizeX/2, py): //center right
				noCollision = false
			case !isTransparent(dc.Image(), px-i.SizeX/2, py+i.SizeY/2): //bottom left
				noCollision = false
			case !isTransparent(dc.Image(), px-i.SizeX/4, py+i.SizeY/2): //bottom 2/5th
				noCollision = false
			case !isTransparent(dc.Image(), px, py+i.SizeY/2): //bottom
				noCollision = false
			case !isTransparent(dc.Image(), px+i.SizeX/4, py+i.SizeY/2): //bottom 4/5th
				noCollision = false
			case !isTransparent(dc.Image(), px+i.SizeX/2, py+i.SizeY/2): //bottom right
				noCollision = false
			default:
				noCollision = true
			}
		}
		dc.DrawImageAnchored(i.DC.Image(), px, py, 0.5, 0.5)
	}

	return dc
}

type bubble struct {
	DC              *gg.Context
	SizeX           int
	SizeY           int
	CoordX, CoordX2 int
	CoordY, CoordY2 int
}

// newBubble creates a bubble object.
// content must be greater than 0.
func newBubble(s string, pt float64) *bubble {
	var b bubble
	inch := 72.272                      //1 inch is 72.272 (font) points. or 72 points. im getting conflicting information here.
	px := inch / 96                     //1 px is 1/96th of an inch. According to some random website.
	padX, padY := 0.0, 0.0              // left in case I change my mind on absolute padding vs relative padding
	to := 25                            // round up to the nearest 25th.
	size := float64(len(s)) * (px * pt) /* this was incorrect but it does make for a nice amount of padding per text.
	It gets wider as you add more text. This is because the program should be cursed. */
	bx, by := size+padX, (pt*2)+padY         // box x and box y
	x, y := roundTo(bx, to), roundTo(by, to) //dc x and dc y

	b.DC = drawBubble(s, pt, x, y, bx, by)
	b.SizeX = int(x)
	b.SizeY = int(y)
	b.CoordX = 0
	b.CoordY = 0
	b.CoordX2 = b.SizeX
	b.CoordY2 = b.SizeY

	return &b
}

// drawBubble creates a gg.Context for a bubble. the size is moved to the nearest 25th pixel and the bubble rests in the center.
func drawBubble(s string, pt, x, y, bx, by float64) *gg.Context {
	dc := gg.NewContext(int(x), int(y))
	err := dc.LoadFontFace("./Hack-Regular.ttf", pt)
	if err != nil {
		print("lol")
	}

	dc.DrawRoundedRectangle((x-bx)/2, (y-by)/2, bx, by, 10)
	dc.SetRGB(1, 1, 1)
	dc.Fill()
	dc.DrawRoundedRectangle((x-bx)/2, (y-by)/2, bx, by, 10)
	dc.SetRGB(256, 256, 256)
	dc.SetLineWidth(3)
	dc.Stroke()
	dc.DrawStringAnchored(s, x/2, y/2, 0.5, 0.5)
	return dc
}

// Move moves a bubble to a new coordinate value.
func (b *bubble) Move(x, y int) {
	b.CoordX, b.CoordX2 = b.CoordX+x, b.CoordX2+x
	b.CoordY, b.CoordY2 = b.CoordY+y, b.CoordY2+y
}

// roundTo rounds base up to the next multiple of To.
func roundTo(base float64, To int) float64 {
	i := int(base)
	for i%To != 0 {
		i++
	}
	return float64(i)
}

func isTransparent(im image.Image, x, y int) bool {
	r, g, b, a := im.At(x, y).RGBA()
	fmt.Printf("X: %v, Y: %v\nred: %v, green: %v, blue: %v, alpha: %v\n", x, y, r, g, b, a)
	if r != 0 || g != 0 || b != 0 || a != 0 {
		return false
	}
	return true
}