Implement playable Mac client and rendering validation

project/effect_space_test.gd

@@ -0,0 +1,22 @@
+extends SceneTree
+const EffectPlayer = preload("res://fx/effect_player.gd")
+var failures := 0
+func check(ok: bool, label: String) -> void:
+	if not ok:
+		failures += 1
+		printerr("FAIL: " + label)
+func _init() -> void:
+	var effect := EffectPlayer.new()
+	var rows := [[0, "MOVING_TYPE_DIRECT", 100, 200, 300], [1, "MOVING_TYPE_DIRECT", 200, 400, 600]]
+	check(effect._position_at(rows, 0).is_equal_approx(Vector3(1, 3, -2)), "source Z goes up and Y goes south")
+	check(effect._position_at(rows, 0.5).is_equal_approx(Vector3(1.5, 4.5, -3)), "movement interpolation uses converted vectors")
+	effect.build({"particles": [{"position": rows, "emitter": {"EmittingDirection": [0, 0, 1], "EmitterShape": 1}}],
+		"lights": [{"position": rows}]})
+	var emitter: GPUParticles3D = effect._emitters[0]
+	check(emitter.position.is_equal_approx(Vector3(1, 3, -2)), "particle spawn shares movement coordinates")
+	check(effect._lights[0].position.is_equal_approx(emitter.position), "light and particle coordinates agree")
+	check(emitter.process_material.direction.is_equal_approx(Vector3.UP), "source upwards emission is upwards")
+	check(emitter.process_material.emission_box_extents.y < 0.01, "ellipse lies on ground plane")
+	effect.free()
+	print("effect_space_test: failures=%d" % failures)
+	quit(1 if failures else 0)