game.go

package main

import (
	_ "image/png"

	"github.com/ForgeLeaf/Forge"
	"github.com/ForgeLeaf/Forge/Graphics"
	"github.com/ForgeLeaf/Forge/Graphics/Viewports"
	"github.com/ForgeLeaf/Forge/Input"
	"github.com/go-gl/gl/v3.3-core/gl"
)

type Game struct {
	batch    *Graphics.Batch
	viewport *Viewports.FitViewport

	goblin   *Player
	werewolf *Player
}

func (game *Game) Create(driver *Forge.Driver) {
	game.batch = Graphics.NewBatch(driver)
	game.viewport = Viewports.NewFitViewport(8, 5, driver.Width, driver.Height)

	goblinTexture, _ := Graphics.NewTexture("assets/Goblin.png")
	goblinTexture.SetFilter(gl.NEAREST, gl.NEAREST)
	game.goblin = NewPlayer(1, 1, goblinTexture, Input.KeyW, Input.KeyS, Input.KeyA, Input.KeyD)

	werewolfTexture, _ := Graphics.NewTexture("assets/Werewolf.png")
	werewolfTexture.SetFilter(gl.NEAREST, gl.NEAREST)
	game.werewolf = NewPlayer(5, 1, werewolfTexture, Input.KeyUp, Input.KeyDown, Input.KeyLeft, Input.KeyRight)

	gl.Enable(gl.BLEND)
	gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

	driver.Input.SetKeyCallback(func(key Input.Key, action Input.Action, modifiers Input.ModifierKey) {
		if key == Input.KeyEscape && action == Input.ActionPress {
			driver.Stop()
		}
	})
}

func (game *Game) Render(driver *Forge.Driver, delta float32) {
	// input
	game.goblin.input(driver)
	game.werewolf.input(driver)

	// logic
	game.viewport.Apply(true)
	game.goblin.logic(delta)
	game.werewolf.logic(delta)

	// draw
	gl.ClearColor(0.52, 0.72, 0.83, 1)
	gl.Clear(gl.COLOR_BUFFER_BIT)
	game.batch.SetProjection(game.viewport.GetCamera().Matrix)
	game.batch.Begin()
	game.goblin.draw(game.batch)
	game.werewolf.draw(game.batch)
	game.batch.End()
}

func (game *Game) Resize(driver *Forge.Driver, width, height float32) {
	game.viewport.Update(width, height, true)
}

func (game *Game) Destroy(driver *Forge.Driver) {
	game.batch.Dispose()
	game.goblin.texture.Dispose()
	game.werewolf.texture.Dispose()
}