Added simple terrain.

cmd/tins2020/terrainrenderer.go

@@ -1,15 +1,41 @@
 package main
 
-import "opslag.de/schobers/tins2020"
+import (
+	"github.com/veandco/go-sdl2/sdl"
+	"opslag.de/schobers/tins2020"
+)
 
 type terrainRenderer struct {
 	terrain *tins2020.Map
+	center  tins2020.PointF
+	zoom    float32
 }
 
 func newTerrainRenderer(terrain *tins2020.Map) *terrainRenderer {
-	return &terrainRenderer{terrain}
+	return &terrainRenderer{terrain: terrain}
 }
 
 func (r *terrainRenderer) Render(ctx *tins2020.Context) {
+	tempToTexture := func(temp float64) *tins2020.Texture {
+		if temp < .2 {
+			return ctx.Textures.Texture("snow")
+		}
+		if temp > .8 {
+			return ctx.Textures.Texture("dirt")
+		}
+		return ctx.Textures.Texture("grass")
+	}
 
+	// horizontal: [191, 321) = 130
+	// vertical: [267,332) = 65
+
+	for y := int32(0); y < 10; y++ {
+		left := -y * 65
+		top := y * 32
+		for x := int32(0); x < 10; x++ {
+			temp := r.terrain.Temp.Value(int(x), int(y))
+			text := tempToTexture(temp)
+			text.Copy(ctx.Renderer, &sdl.Rect{X: left + x*65, Y: top + x*32, W: 512, H: 512})
+		}
+	}
 }

cmd/tins2020/tins2020.go

@@ -16,12 +16,20 @@ func main() {
 	}
 }
 
+func logSDLVersion() {
+	var version sdl.Version
+	sdl.GetVersion(&version)
+	log.Printf("SDL version: %d.%d.%d", version.Major, version.Minor, version.Patch)
+}
+
 func run() error {
 	if err := sdl.Init(sdl.INIT_EVERYTHING); err != nil {
 		return err
 	}
 	defer sdl.Quit()
 
+	logSDLVersion()
+
 	if err := ttf.Init(); err != nil {
 		return err
 	}
@@ -40,8 +48,9 @@ func run() error {
 		}
 	}
 
+	sdl.SetHint(sdl.HINT_RENDER_SCALE_QUALITY, "1")
 	window, err := sdl.CreateWindow("TINS 2020", ctx.Settings.Window.Location.X, ctx.Settings.Window.Location.Y,
-		800, 600, sdl.WINDOW_SHOWN)
+		800, 600, sdl.WINDOW_SHOWN|sdl.WINDOW_RESIZABLE)
 	if err != nil {
 		return err
 	}
@@ -59,6 +68,17 @@ func run() error {
 	if err != nil {
 		return err
 	}
+	err = ctx.Textures.Load(
+		"dirt", "images/dirt.png",
+		"grass", "images/grass.png",
+		"snow", "images/snow.png",
+	)
+	if err != nil {
+		return err
+	}
+
+	game := tins2020.NewGame()
+	tr := newTerrainRenderer(game.Terrain)
 
 	running := true
 	for running {
@@ -79,8 +99,12 @@ func run() error {
 
 		renderer.SetDrawColor(0, 0, 0, 255)
 		renderer.Clear()
-		renderer.SetDrawColor(255, 0, 0, 255)
-		renderer.FillRect(&sdl.Rect{0, 0, 200, 200})
+		// renderer.SetDrawColor(255, 0, 0, 255)
+		// renderer.FillRect(&sdl.Rect{0, 0, 200, 200})
+		// ctx.Textures.Texture("grass").Copy(renderer, &sdl.Rect{X: 200, Y: 100, W: 456, H: 356})
+		// ctx.Textures.Texture("dirt").Copy(renderer, &sdl.Rect{X: 143, Y: 122, W: 456, H: 356})
+		// ctx.Textures.Texture("snow").Copy(renderer, &sdl.Rect{X: 257, Y: 122, W: 456, H: 356})
+		tr.Render(ctx)
 		renderer.Present()
 	}
 	return nil

context.go

@@ -6,6 +6,7 @@ import (
 )
 
 type Context struct {
+	Renderer  *sdl.Renderer
 	Fonts     Fonts
 	Resources Resources
 	Textures  Textures
@@ -26,8 +27,9 @@ func NewContext(res *rice.Box) (*Context, error) {
 }
 
 func (c *Context) Init(renderer *sdl.Renderer) {
+	c.Renderer = renderer
 	c.Fonts.Init(c.Resources.Copy())
-	c.Textures.Init(renderer)
+	c.Textures.Init(renderer, c.Resources.Copy())
 }
 
 func (c *Context) Destroy() {

game.go

@@ -27,7 +27,7 @@ func NewNoiseMap(seed int64) *NoiseMap {
 	return &NoiseMap{
 		noise:     noise.NewPerlin(seed),
 		alpha:     2,
-		beta:      2,
+		beta:      2.13,
 		harmonics: 4,
 	}
 }

textures.go

@@ -1,34 +1,91 @@
 package tins2020
 
 import (
+	"errors"
+	"fmt"
+
 	"github.com/veandco/go-sdl2/img"
 	"github.com/veandco/go-sdl2/sdl"
+	"opslag.de/schobers/fs/vfs"
 )
 
+type Texture struct {
+	texture *sdl.Texture
+	rect    *sdl.Rect
+}
+
+func NewTextureFromSurface(renderer *sdl.Renderer, surface *sdl.Surface) (*Texture, error) {
+	texture, err := renderer.CreateTextureFromSurface(surface)
+	if err != nil {
+		return nil, err
+	}
+	return &Texture{texture: texture, rect: &sdl.Rect{X: 0, Y: 0, W: surface.W, H: surface.H}}, nil
+}
+
+func (t *Texture) Rect() *sdl.Rect { return t.rect }
+
+func (t *Texture) Copy(renderer *sdl.Renderer, target *sdl.Rect) {
+	renderer.Copy(t.texture, t.rect, target)
+}
+
+// func (t *Texture) CopyF(renderer *sdl.Renderer, target *sdl.FRect) {
+// 	renderer.CopyF(t.texture, t.rect, target) // Depends on SDL >=2.0.10
+// }
+
+func (t *Texture) Destroy() { t.texture.Destroy() }
+
 type Textures struct {
+	dir      vfs.CopyDir
 	renderer *sdl.Renderer
-	textures map[string]*sdl.Texture
+	textures map[string]*Texture
 }
 
-func (t *Textures) Init(renderer *sdl.Renderer) {
+func (t *Textures) Init(renderer *sdl.Renderer, dir vfs.CopyDir) {
+	t.dir = dir
 	t.renderer = renderer
-	t.textures = map[string]*sdl.Texture{}
+	t.textures = map[string]*Texture{}
 }
 
-func (t *Textures) Load(name, path string, size int) error {
-	surface, err := img.Load(name)
+func (t *Textures) Load(name, path string, other ...string) error {
+	err := t.load(name, path)
+	if err != nil {
+		return err
+	}
+	if len(other) == 0 {
+		return nil
+	}
+	if len(other)%2 != 0 {
+		return errors.New("expected name/path pairs")
+	}
+	for i := 0; i < len(other); i += 2 {
+		err = t.load(other[i], other[i+1])
+		if err != nil {
+			return fmt.Errorf("error loading '%s'; error: %v", other[i], err)
+		}
+	}
+	return nil
+}
+
+func (t *Textures) load(name, path string) error {
+	texturePath, err := t.dir.Retrieve(path)
+	if err != nil {
+		return err
+	}
+	surface, err := img.Load(texturePath)
 	if err != nil {
 		return err
 	}
 	defer surface.Free()
-	texture, err := t.renderer.CreateTextureFromSurface(surface)
-	if t.textures == nil {
-		t.textures = map[string]*sdl.Texture{}
+	texture, err := NewTextureFromSurface(t.renderer, surface)
+	if err != nil {
+		return err
 	}
 	t.textures[name] = texture
 	return nil
 }
 
+func (t *Textures) Texture(name string) *Texture { return t.textures[name] }
+
 func (t *Textures) Destroy() {
 	if t.textures == nil {
 		return