今天一个朋友问的Unity问题，我试着用 Godot的 Shader实现一下。用Unity实现的话，原理是相同的
效果展示如果要凸起更圆润的话，增加面片的细分就可以，代码部分应该可以优化，坐标运算搞得自己头晕了
GDScript部分
extends Camera
const ray_length : int = 1000
func _input(event):
if event is InputEventMouse:
var from:Vector3 = project_ray_origin(event.position)
var to:Vector3 = from + project_ray_normal(event.position) * ray_length
var state:PhysicsDirectSpaceState = get_world().direct_space_state
var result:Dictionary = state.intersect_ray(from,to)
if result:
get_tree().call_group("M_LISTENER","on_Mouse_move",result.position)
extends MeshInstance
onready var size : float = get("mesh").size.x
onready var mat = get("material/0")
func _ready():
add_to_group("M_LISTENER")
func on_Mouse_move(pos : Vector3):
var p2 = Vector2(0,1) + Vector2(pos.y,pos.x) / size
mat.set_shader_param("position",p2)
Shader部分
shader_type spatial;
render_mode cull_disabled;
uniform sampler2D stamp : hint_albedo;
uniform vec2 position;
uniform float bob_scale = 1.0;
uniform vec4 color : hint_color;
varying vec2 vertex_position;
void vertex(){
vertex_position = UV - position;
VERTEX.y += texture(stamp,vertex_position).r*bob_scale;
}
void fragment(){
ALBEDO = color.rgb;
NORMALMAP = texture(stamp,vertex_position).rgb;
}
stamp贴图
