entity: physics rewrite

internal/game/imgui.go

@@ -3,6 +3,7 @@ package game
 import (
 	"fmt"
 	"log"
+	"math"
 	"os"
 	"runtime"
 
@@ -52,7 +53,8 @@ func (g *Game) imgui() {
 	if imgui.BeginV("Player", nil, imgui.WindowFlagsAlwaysAutoResize) {
 		pos := g.player.Position()
 		vel := g.player.Speed()
-		imgui.Text(fmt.Sprintf("Pos: (%.5f, %.5f, %.5f), Vel: (%.5f, %.5f, %.5f)", pos[0], pos[1], pos[2], vel[0], vel[1], vel[2]))
+		igwrap.Text("Pos: (%.5f, %.5f, %.5f), Vel: (%.5f, %.5f, %.5f)", pos[0], pos[1], pos[2], vel[0], vel[1], vel[2])
+		igwrap.Text("VelXZ=%.5f, VelXYZ=%.5f", math.Sqrt(vel[0]*vel[0]+vel[2]*vel[2]), vel.Length())
 	}
 	imgui.End()