forked from iand/amberfell
/
picker.go
161 lines (131 loc) · 4.27 KB
/
picker.go
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/*
To the extent possible under law, Ian Davis has waived all copyright
and related or neighboring rights to this Amberfell Source Code file.
This work is published from the United Kingdom.
*/
package main
import (
"fmt"
"github.com/banthar/Go-SDL/sdl"
"github.com/banthar/gl"
"math"
)
type Picker struct {
x, y, radius, actionItemRadius, selectionRadius float32
}
func NewPicker() *Picker {
var p Picker
p.radius = float32(90) * PIXEL_SCALE
p.actionItemRadius = p.radius - BLOCK_SCALE*1.5
p.selectionRadius = BLOCK_SCALE * 1.2
return &p
}
func (self *Picker) Draw(t int64) {
gl.MatrixMode(gl.MODELVIEW)
gl.PushMatrix()
gl.LoadIdentity()
gl.Disable(gl.DEPTH_TEST)
gl.Disable(gl.LIGHTING)
gl.Disable(gl.LIGHT0)
gl.Disable(gl.LIGHT1)
gl.Begin(gl.TRIANGLE_FAN)
gl.Color4ub(0, 0, 0, 128)
gl.Vertex2f(self.x, self.y)
for angle := float64(0); angle <= 2*math.Pi; angle += math.Pi / 2 / 10 {
gl.Vertex2f(self.x-float32(math.Sin(angle))*self.radius, self.y+float32(math.Cos(angle))*self.radius)
}
gl.End()
self.DrawItemHighlight(t, ThePlayer.currentAction)
self.DrawPlayerItems(t, true)
gl.PopMatrix()
}
func (self *Picker) DrawItemHighlight(t int64, position Action) {
gl.PushMatrix()
gl.LoadIdentity()
actionItemAngle := -(float64(position) - 1.5) * math.Pi / 4
gl.Begin(gl.TRIANGLE_FAN)
gl.Color4ub(64, 64, 64, 228)
gl.Vertex2f(self.x-self.actionItemRadius*float32(math.Sin(actionItemAngle)), self.y+self.actionItemRadius*float32(math.Cos(actionItemAngle)))
for angle := float64(0); angle <= 2*math.Pi; angle += math.Pi / 2 / 10 {
gl.Vertex2f(self.x-self.actionItemRadius*float32(math.Sin(actionItemAngle))-float32(math.Sin(angle))*self.selectionRadius, self.y+self.actionItemRadius*float32(math.Cos(actionItemAngle))+float32(math.Cos(angle))*self.selectionRadius)
}
gl.End()
gl.PopMatrix()
}
func (self *Picker) DrawPlayerItems(t int64, drawQuantities bool) {
gl.PushMatrix()
gl.LoadIdentity()
for i := 0; i < 5; i++ {
itemid := ThePlayer.equippedItems[i]
if itemid != ITEM_NONE {
angle := -(float64(i) + 1.5) * math.Pi / 4
gl.LoadIdentity()
x := self.x - self.actionItemRadius*float32(math.Sin(angle))
y := self.y + self.actionItemRadius*float32(math.Cos(angle))
gl.Translatef(x, y, 0)
gl.Rotated(90, 1.0, 0.0, 0.0)
gl.Rotated(30*math.Sin(float64(t)/1e9+float64(itemid)/2), 0.0, 1.0, 0.0)
gl.Scalef(BLOCK_SCALE, BLOCK_SCALE, BLOCK_SCALE)
gGuiBuffer.Reset()
if itemid < 256 {
TerrainCube(gGuiBuffer, Vectori{}, [18]BlockId{BLOCK_DIRT, BLOCK_DIRT, BLOCK_DIRT, BLOCK_DIRT, BLOCK_AIR, BLOCK_DIRT, BLOCK_AIR, BLOCK_AIR, BLOCK_AIR, BLOCK_AIR, BLOCK_AIR, BLOCK_AIR, BLOCK_AIR, BLOCK_AIR, BLOCK_AIR, BLOCK_AIR, BLOCK_AIR}, NewBlockDefault(BlockId(itemid)), FACE_NONE)
} else {
RenderItemFlat(gGuiBuffer, Vectori{}, BlockId(itemid))
}
gGuiBuffer.RenderDirect(false)
if drawQuantities {
gl.LoadIdentity()
gl.Translatef(x-17*PIXEL_SCALE, y-19*PIXEL_SCALE, 20)
consoleFont.Print(fmt.Sprintf("%d", ThePlayer.inventory[itemid]))
}
}
}
gl.PopMatrix()
}
// x and y are in screen2d coords
func (self *Picker) HitTest(x, y float64) (bool, int) {
for i := 0; i < 8; i++ {
angle := -(float64(i) - 1.5) * math.Pi / 4
ix := float64(picker.x) - float64(picker.actionItemRadius)*math.Sin(angle)
iy := float64(picker.y) + float64(picker.actionItemRadius)*math.Cos(angle)
if x > ix-float64(picker.selectionRadius) && x < ix+float64(picker.selectionRadius) &&
y > iy-float64(picker.selectionRadius) && y < iy+float64(picker.selectionRadius) {
return true, i
}
}
return false, 0
}
func (self *Picker) HandleMouseButton(re *sdl.MouseButtonEvent) {
if re.Button == 1 && re.State == 1 { // LEFT, DOWN
x, y := viewport.ScreenCoordsToWorld2D(re.X, re.Y)
if hit, pos := self.HitTest(x, y); hit {
ThePlayer.SelectAction(pos)
}
}
}
func (self *Picker) HandleKeys(keys []uint8) {
if keys[sdl.K_1] != 0 {
ThePlayer.SelectAction(0)
}
if keys[sdl.K_2] != 0 {
ThePlayer.SelectAction(1)
}
if keys[sdl.K_3] != 0 {
ThePlayer.SelectAction(2)
}
if keys[sdl.K_4] != 0 {
ThePlayer.SelectAction(3)
}
if keys[sdl.K_5] != 0 {
ThePlayer.SelectAction(4)
}
if keys[sdl.K_6] != 0 {
ThePlayer.SelectAction(5)
}
if keys[sdl.K_7] != 0 {
ThePlayer.SelectAction(6)
}
if keys[sdl.K_8] != 0 {
ThePlayer.SelectAction(7)
}
}