From de366eb096c7659bb7e068f16c7090012f3bd73a Mon Sep 17 00:00:00 2001
From: Valentin Stark <valentin@medialsace.fr>
Date: Sun, 4 Sep 2022 19:07:47 +0200
Subject: [PATCH 1/2] =?UTF-8?q?proto=20herbe=20+=20for=C3=AAt?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 world/World3d.gd           |  22 +++++++++++-----------
 world/game.tscn            |  21 ++++++++++++++++++++-
 world/materials/colors.png | Bin 4777 -> 5008 bytes
 3 files changed, 31 insertions(+), 12 deletions(-)

diff --git a/world/World3d.gd b/world/World3d.gd
index e7c5792..39fe812 100644
--- a/world/World3d.gd
+++ b/world/World3d.gd
@@ -29,14 +29,14 @@ func add_trees():
 	var poisson_disc_sampling: PoissonDiscSampling = PoissonDiscSampling.new()
 	
 	for center in Global.terrain.get_centers():
-		if not center.get_data("water") and not center.get_data("coast") and not center.get_data("mountain"):
-			var num = rng.randi_range(0,10)
-			if num == 1:
-				var points2d = poisson_disc_sampling.generate_points(3, center.polygon(), 2)
-				for point in points2d:
-					var tree = treescene.instance()
-					var scaling = rng.randi_range(0.8, 1.2)
-					tree.scale = Vector3(scaling, scaling, scaling)
-					tree.rotate_y(rng.randi_range(0, 2*PI))
-					tree.translation = Vector3(point.x, center.get_elevation() * 120, point.y)
-					add_child(tree)
+		if not center.get_data("water"):
+			var num = rng.randi_range(0,100)
+			if center.get_data("forest") or num == 1:
+					var points2d = poisson_disc_sampling.generate_points(3, center.polygon(), 2)
+					for point in points2d:
+						var tree = treescene.instance()
+						var scaling = rng.randi_range(0.8, 1.2)
+						tree.scale = Vector3(scaling, scaling, scaling)
+						tree.rotate_y(rng.randi_range(0, 2*PI))
+						tree.translation = Vector3(point.x, center.get_elevation() * 120, point.y)
+						add_child(tree)
diff --git a/world/game.tscn b/world/game.tscn
index 7cf1029..dcfaf58 100644
--- a/world/game.tscn
+++ b/world/game.tscn
@@ -1,10 +1,13 @@
-[gd_scene load_steps=15 format=2]
+[gd_scene load_steps=19 format=2]
 
 [ext_resource path="res://ui/ui.tscn" type="PackedScene" id=1]
 [ext_resource path="res://world/materials/outline.tres" type="Shader" id=2]
 [ext_resource path="res://world/default_env.tres" type="Environment" id=3]
 [ext_resource path="res://world/World3d.gd" type="Script" id=4]
 [ext_resource path="res://utils/camera/CamBase.tscn" type="PackedScene" id=5]
+[ext_resource path="res://world/materials/wind_grass.tres" type="Material" id=6]
+[ext_resource path="res://world/grass.obj" type="ArrayMesh" id=7]
+[ext_resource path="res://world/MultiMeshInstance.gd" type="Script" id=8]
 
 [sub_resource type="PlaneMesh" id=1]
 size = Vector2( 2000, 2000 )
@@ -160,6 +163,17 @@ shader_param/_round = true
 shader_param/outline_bias = 0.0
 shader_param/outline_color = Color( 0, 0, 0, 1 )
 
+[sub_resource type="MultiMesh" id=11]
+color_format = 1
+transform_format = 1
+custom_data_format = 1
+instance_count = 1024
+visible_instance_count = 512
+mesh = ExtResource( 7 )
+transform_array = PoolVector3Array( 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 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+
 [node name="Game" type="Node"]
 
 [node name="UI" parent="." instance=ExtResource( 1 )]
@@ -202,6 +216,11 @@ extra_cull_margin = 3653.19
 mesh = SubResource( 8 )
 material/0 = SubResource( 9 )
 
+[node name="MultiMeshInstance" type="MultiMeshInstance" parent="World3d"]
+material_override = ExtResource( 6 )
+multimesh = SubResource( 11 )
+script = ExtResource( 8 )
+
 [connection signal="map_clicked" from="UI/Map" to="World3d/CamBase/Camera" method="_on_Map_map_clicked"]
 [connection signal="camera_moved" from="World3d/CamBase/Camera" to="UI/Map/Cursor" method="_on_Camera_camera_moved"]
 
diff --git a/world/materials/colors.png b/world/materials/colors.png
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From 0db982723bdc132a6bde7eaa53213cfa42864d38 Mon Sep 17 00:00:00 2001
From: Valentin Stark <valentin@medialsace.fr>
Date: Sun, 4 Sep 2022 19:07:48 +0200
Subject: [PATCH 2/2] proto herbe

---
 ui/map/map.gd                     |   4 +-
 world/Default OBJ.material        | Bin 0 -> 1671 bytes
 world/MultiMeshInstance.gd        |  28 +++++++++++
 world/game.tscn                   |   1 -
 world/grass.mtl                   |  12 +++++
 world/grass.obj                   |  32 +++++++++++++
 world/grass.obj.import            |  20 ++++++++
 world/grass_triangle.obj          |  29 +++++++++++
 world/grass_triangle.obj.import   |  20 ++++++++
 world/materials/wind_grass.shader |  77 ++++++++++++++++++++++++++++++
 world/materials/wind_grass.tres   |  40 ++++++++++++++++
 11 files changed, 260 insertions(+), 3 deletions(-)
 create mode 100644 world/Default OBJ.material
 create mode 100644 world/MultiMeshInstance.gd
 create mode 100644 world/grass.mtl
 create mode 100644 world/grass.obj
 create mode 100644 world/grass.obj.import
 create mode 100644 world/grass_triangle.obj
 create mode 100644 world/grass_triangle.obj.import
 create mode 100644 world/materials/wind_grass.shader
 create mode 100644 world/materials/wind_grass.tres

diff --git a/ui/map/map.gd b/ui/map/map.gd
index 1e4de14..627cf15 100644
--- a/ui/map/map.gd
+++ b/ui/map/map.gd
@@ -19,8 +19,8 @@ func heightmap():
 			if center.get_data("ocean"):
 				# var factor = pow((center.get_elevation()+1.001), 10) / 5.0
 				color = Color("#5e4fa2")
-			if center.get_data("snow"):
-				color = Color.white
+#			if center.get_data("snow"):
+#				color = Color.white
 			# if center.get_data("coast"):
 				# color = Color.black
 			if center.polygon().size() > 2:
diff --git a/world/Default OBJ.material b/world/Default OBJ.material
new file mode 100644
index 0000000000000000000000000000000000000000..47d5ce244d72e73ccb6729fdbdabdc51bb37bc36
GIT binary patch
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HcmV?d00001

diff --git a/world/MultiMeshInstance.gd b/world/MultiMeshInstance.gd
new file mode 100644
index 0000000..c6b5366
--- /dev/null
+++ b/world/MultiMeshInstance.gd
@@ -0,0 +1,28 @@
+extends MultiMeshInstance
+
+var extents = Vector2(10, 10)
+
+func _ready():
+	var poisson_disc_sampling: PoissonDiscSampling = PoissonDiscSampling.new()
+	var rng := RandomNumberGenerator.new()
+	rng.randomize()
+	var coords = []
+	for center in Global.terrain.get_centers():
+		if (
+			not center.get_data("mountain")
+			and not center.get_data("water")
+			and not center.get_data("coast")
+		):
+			var points = poisson_disc_sampling.generate_points(2, center.polygon(), 2)
+			var points3d = []
+			for point in points:
+				points3d.append(Vector3(point.x, center.get_elevation() * 120, point.y))
+			coords += points3d
+	multimesh.instance_count = coords.size()
+	for instance_index in multimesh.instance_count:
+
+		var transform := Transform().rotated(Vector3.UP, rng.randf_range(-PI / 2, PI / 2))
+		transform.origin = Vector3(coords[instance_index].x, coords[instance_index].y, coords[instance_index].z)
+#		transform.scaled(Vector3())
+		
+		multimesh.set_instance_transform(instance_index, transform)
diff --git a/world/game.tscn b/world/game.tscn
index dcfaf58..c1de306 100644
--- a/world/game.tscn
+++ b/world/game.tscn
@@ -168,7 +168,6 @@ color_format = 1
 transform_format = 1
 custom_data_format = 1
 instance_count = 1024
-visible_instance_count = 512
 mesh = ExtResource( 7 )
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diff --git a/world/grass.mtl b/world/grass.mtl
new file mode 100644
index 0000000..44b3c44
--- /dev/null
+++ b/world/grass.mtl
@@ -0,0 +1,12 @@
+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl Default_OBJ
+Ns 250.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.450000
+d 1.000000
+illum 2
diff --git a/world/grass.obj b/world/grass.obj
new file mode 100644
index 0000000..6cb1924
--- /dev/null
+++ b/world/grass.obj
@@ -0,0 +1,32 @@
+# Blender v3.2.2 OBJ File: ''
+# www.blender.org
+mtllib grass.mtl
+o grass_triangle
+v 0.012754 0.302056 0.000000
+v 0.000000 0.402742 0.000000
+v -0.012754 0.302056 0.000000
+v 0.025508 0.201371 0.000000
+v -0.038262 0.100685 0.000000
+v 0.038262 0.100685 0.000000
+v -0.051016 0.000000 0.000000
+v 0.051016 0.000000 0.000000
+v -0.025508 0.201371 0.000000
+vt 0.621057 0.520384
+vt 0.497980 0.979655
+vt 0.376628 0.520384
+vt 0.744133 0.238847
+vt 0.133923 0.098911
+vt 0.867209 0.098911
+vt 0.012570 0.013663
+vt 0.990286 0.013663
+vt 0.255275 0.238847
+vn 0.0000 -0.0000 1.0000
+usemtl Default_OBJ
+s 1
+f 1/1/1 2/2/1 3/3/1
+f 4/4/1 5/5/1 6/6/1
+f 6/6/1 7/7/1 8/8/1
+f 1/1/1 9/9/1 4/4/1
+f 4/4/1 9/9/1 5/5/1
+f 6/6/1 5/5/1 7/7/1
+f 1/1/1 3/3/1 9/9/1
diff --git a/world/grass.obj.import b/world/grass.obj.import
new file mode 100644
index 0000000..9999aca
--- /dev/null
+++ b/world/grass.obj.import
@@ -0,0 +1,20 @@
+[remap]
+
+importer="wavefront_obj"
+type="Mesh"
+path="res://.import/grass.obj-b367f86df935fca9f4b72c7070d3608f.mesh"
+
+[deps]
+
+files=[ "res://.import/grass.obj-b367f86df935fca9f4b72c7070d3608f.mesh" ]
+
+source_file="res://world/grass.obj"
+dest_files=[ "res://.import/grass.obj-b367f86df935fca9f4b72c7070d3608f.mesh", "res://.import/grass.obj-b367f86df935fca9f4b72c7070d3608f.mesh" ]
+
+[params]
+
+generate_tangents=true
+scale_mesh=Vector3( 1, 1, 1 )
+offset_mesh=Vector3( 0, 0, 0 )
+octahedral_compression=true
+optimize_mesh_flags=4286
diff --git a/world/grass_triangle.obj b/world/grass_triangle.obj
new file mode 100644
index 0000000..a33a275
--- /dev/null
+++ b/world/grass_triangle.obj
@@ -0,0 +1,29 @@
+# Blender v2.83.0 OBJ File: ''
+# www.blender.org
+v -0.255078 0.000000 0.000000
+v 0.255078 0.000000 0.000000
+v 0.000000 2.013708 0.000000
+v -0.127539 1.006854 0.000000
+v 0.127539 1.006854 0.000000
+v -0.191308 0.503427 0.000000
+v 0.063769 1.510281 0.000000
+v -0.063769 1.510281 0.000000
+v 0.191308 0.503427 0.000000
+vt 0.621057 0.520384
+vt 0.497980 0.979655
+vt 0.376628 0.520384
+vt 0.744133 0.238847
+vt 0.133923 0.098911
+vt 0.867209 0.098911
+vt 0.012570 0.013663
+vt 0.990286 0.013663
+vt 0.255275 0.238847
+vn 0.0000 0.0000 1.0000
+s 1
+f 7/1/1 3/2/1 8/3/1
+f 5/4/1 6/5/1 9/6/1
+f 9/6/1 1/7/1 2/8/1
+f 7/1/1 4/9/1 5/4/1
+f 5/4/1 4/9/1 6/5/1
+f 9/6/1 6/5/1 1/7/1
+f 7/1/1 8/3/1 4/9/1
diff --git a/world/grass_triangle.obj.import b/world/grass_triangle.obj.import
new file mode 100644
index 0000000..3885ced
--- /dev/null
+++ b/world/grass_triangle.obj.import
@@ -0,0 +1,20 @@
+[remap]
+
+importer="wavefront_obj"
+type="Mesh"
+path="res://.import/grass_triangle.obj-46b3ab3674e3d39ea8727b7c5a77c4a9.mesh"
+
+[deps]
+
+files=[ "res://.import/grass_triangle.obj-46b3ab3674e3d39ea8727b7c5a77c4a9.mesh" ]
+
+source_file="res://world/grass_triangle.obj"
+dest_files=[ "res://.import/grass_triangle.obj-46b3ab3674e3d39ea8727b7c5a77c4a9.mesh", "res://.import/grass_triangle.obj-46b3ab3674e3d39ea8727b7c5a77c4a9.mesh" ]
+
+[params]
+
+generate_tangents=true
+scale_mesh=Vector3( 1, 1, 1 )
+offset_mesh=Vector3( 0, 0, 0 )
+octahedral_compression=true
+optimize_mesh_flags=4286
diff --git a/world/materials/wind_grass.shader b/world/materials/wind_grass.shader
new file mode 100644
index 0000000..d2107b9
--- /dev/null
+++ b/world/materials/wind_grass.shader
@@ -0,0 +1,77 @@
+shader_type spatial;
+render_mode cull_disabled, unshaded;
+
+uniform float wind_speed = 0.2;
+uniform float wind_strength = 2.0;
+// How big, in world space, is the noise texture
+// wind will tile every wind_texture_tile_size
+uniform float wind_texture_tile_size = 20.0;
+uniform float wind_vertical_strength = 0.3;
+uniform vec2 wind_horizontal_direction = vec2(1.0, 0.5);
+
+uniform sampler2D color_ramp : hint_black_albedo;
+// we need a tiling noise here!
+uniform sampler2D wind_noise : hint_black;
+
+uniform vec3 character_position;
+uniform float character_radius = 3.0;
+uniform sampler2D character_distance_falloff_curve : hint_black_albedo;
+uniform float character_push_strength = 1.0;
+
+varying float debug_wind;
+
+void vertex() {
+	vec3 world_vert = (WORLD_MATRIX * vec4(VERTEX, 1.0)).xyz;
+
+	vec2 normalized_wind_direction = normalize(wind_horizontal_direction);
+	vec2 world_uv = world_vert.xz / wind_texture_tile_size + normalized_wind_direction * TIME * wind_speed;
+	// we displace only the top part of the mesh
+	// note that this means that the mesh needs to have UV in a way that the bottom of UV space
+	// is at the top of the mesh
+	float displacement_affect = (1.0 - UV.y);
+	float wind_noise_intensity = (textureLod(wind_noise, world_uv, 0.0).r - 0.5);
+
+	// We convert the direction of the wind into vertex space from world space
+	// if we used it directly in vertex space, rotated blades of grass wouldn't behave properly
+	vec2 vert_space_horizontal_dir = 
+			(inverse(WORLD_MATRIX) * vec4(wind_horizontal_direction, 0.0, 0.0)).xy;
+	
+	vert_space_horizontal_dir = normalize(vert_space_horizontal_dir);
+	
+	vec3 bump_wind = vec3(
+		wind_noise_intensity * vert_space_horizontal_dir.x,
+		1.0 - wind_noise_intensity,
+		wind_noise_intensity * vert_space_horizontal_dir.y);
+	
+	normalize(bump_wind);
+	
+	bump_wind *= vec3(wind_strength, wind_vertical_strength, wind_strength);
+	
+	VERTEX += bump_wind * displacement_affect;
+	
+	// At the moment the blades are pushed away in a perfectly circular manner.
+	// We could distort the distance to the character based on a noise, to break a bit the
+	// circular shape. We could distort the falloff by sampling in a noise based on the xz coordinates.
+	// The task is left to the reader
+	
+	vec3 dir_to_character = character_position - WORLD_MATRIX[3].xyz;
+	// uncomment the following line to have a horizontal only character push
+	//dir_to_character.y = 0.0;
+	float distance_to_character = length(dir_to_character);
+	float falloff = 1.0 - smoothstep(0.0, 1.0, distance_to_character/character_radius);
+	// Because we operate in vertex space, we need to convert the direction to the character
+	// in vertex space. Otherwise, it wouldn't work for rotated blades of grass.
+	// comment the next line to observe how the blades are not all facing away from the character.
+	dir_to_character = (inverse(WORLD_MATRIX) * vec4(dir_to_character, 0.0)).xyz;
+	dir_to_character = normalize(dir_to_character);
+
+	// sample the curve based on how far we are from the character, in normalized coordinates
+	float falloff_curve = texture(character_distance_falloff_curve, vec2(falloff)).x;
+	// direction to character is inverted because we want to point away from it
+	VERTEX += normalize(-dir_to_character) * falloff_curve * character_push_strength * displacement_affect;
+	
+}
+
+void fragment() {
+	ALBEDO = texture(color_ramp, vec2(1.0 - UV.y, 0)).rgb ;
+}
\ No newline at end of file
diff --git a/world/materials/wind_grass.tres b/world/materials/wind_grass.tres
new file mode 100644
index 0000000..5af6a2f
--- /dev/null
+++ b/world/materials/wind_grass.tres
@@ -0,0 +1,40 @@
+[gd_resource type="ShaderMaterial" load_steps=8 format=2]
+
+[ext_resource path="res://world/materials/wind_grass.shader" type="Shader" id=1]
+
+[sub_resource type="Curve" id=1]
+_data = [ Vector2( 0, 0 ), 0.0, 2.71765, 0, 0, Vector2( 1, 1 ), -0.129412, 0.0, 0, 0 ]
+
+[sub_resource type="CurveTexture" id=2]
+width = 128
+curve = SubResource( 1 )
+
+[sub_resource type="Gradient" id=3]
+offsets = PoolRealArray( 0, 0.486339, 0.966102 )
+colors = PoolColorArray( 0.054902, 0.556863, 0.439216, 1, 0.321569, 0.886275, 0.341176, 1, 0.498039, 0.921569, 0.356863, 1 )
+
+[sub_resource type="GradientTexture" id=4]
+gradient = SubResource( 3 )
+
+[sub_resource type="OpenSimplexNoise" id=5]
+period = 109.1
+persistence = 0.138
+lacunarity = 0.44
+
+[sub_resource type="NoiseTexture" id=6]
+seamless = true
+noise = SubResource( 5 )
+
+[resource]
+shader = ExtResource( 1 )
+shader_param/wind_speed = 0.2
+shader_param/wind_strength = 2.0
+shader_param/wind_texture_tile_size = 20.0
+shader_param/wind_vertical_strength = 0.3
+shader_param/wind_horizontal_direction = Vector2( 1, 0.5 )
+shader_param/character_position = Vector3( 0, 1.22062, 0 )
+shader_param/character_radius = 3.0
+shader_param/character_push_strength = 1.0
+shader_param/color_ramp = SubResource( 4 )
+shader_param/wind_noise = SubResource( 6 )
+shader_param/character_distance_falloff_curve = SubResource( 2 )