add extract functions to build gradient vector (cc8ea0ee) · Commits · blackheaven / tinygraphs

extract/extract.go

+69 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@ import (
		"strconv"
		"strings"

		"github.com/taironas/tinygraphs/colors"
		"github.com/taironas/tinygraphs/format"
		)

		@@ -230,3 +231,71 @@ func XTriangles(r *http.Request) int {
		}
		return 50
		}

		// GX1 returns the value of the 'gx1' parameter in the http.Request.
		// Used to defined the x coordinate of first point of the gradient vector.
		func GX1(r *http.Request) uint8 {
		strX := r.FormValue("gx1")
		if len(strX) > 0 {
		if x, errX := strconv.ParseInt(strX, 0, 64); errX == nil {
		ix := uint8(x)
		if ix > 0 {
		return ix
		}
		}
		}
		return uint8(0)
		}

		// GX2 returns the value of the 'gx2' parameter in the http.Request.
		// Used to defined the x coordinate of second point of the gradient vector.
		func GX2(r *http.Request) uint8 {
		strX := r.FormValue("gx2")
		if len(strX) > 0 {
		if x, errX := strconv.ParseInt(strX, 0, 64); errX == nil {
		ix := uint8(x)
		if ix > 0 {
		return ix
		}
		}
		}
		return uint8(100)
		}

		// GY1 returns the value of the 'gy1' parameter in the http.Request.
		// Used to defined the y coordinate of first point of the gradient vector.
		func GY1(r *http.Request) uint8 {
		strY := r.FormValue("gy1")
		if len(strY) > 0 {
		if y, errY := strconv.ParseInt(strY, 0, 64); errY == nil {
		iy := uint8(y)
		if iy > 0 {
		return iy
		}
		}
		}
		return uint8(0)
		}

		// GY2 returns the value of the 'gy2' parameter in the http.Request.
		// Used to defined the y coordinate of the second point of the gradient vector.
		func GY2(r *http.Request) uint8 {
		strY := r.FormValue("gy2")
		if len(strY) > 0 {
		if y, errY := strconv.ParseInt(strY, 0, 64); errY == nil {
		iy := uint8(y)
		if iy > 0 {
		return iy
		}
		}
		}
		return uint8(0)
		}

		func GradientVector(r *http.Request) colors.GradientVector {
		x1 := GX1(r)
		y1 := GY1(r)
		x2 := GX2(r)
		y2 := GY2(r)
		return colors.GradientVector{x1, y1, x2, y2}
		}