You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
369 lines
13 KiB
369 lines
13 KiB
using UnityEngine;
|
|
using System.Collections;
|
|
using System.Collections.Generic;
|
|
|
|
[ExecuteInEditMode] // Make water live-update even when not in play mode
|
|
public class Water : MonoBehaviour
|
|
{
|
|
public enum WaterMode {
|
|
Simple = 0,
|
|
Reflective = 1,
|
|
Refractive = 2,
|
|
};
|
|
public WaterMode m_WaterMode = WaterMode.Refractive;
|
|
public bool m_DisablePixelLights = true;
|
|
public int m_TextureSize = 256;
|
|
public float m_ClipPlaneOffset = 0.07f;
|
|
|
|
public LayerMask m_ReflectLayers = -1;
|
|
public LayerMask m_RefractLayers = -1;
|
|
|
|
private Dictionary<Camera, Camera> m_ReflectionCameras = new Dictionary<Camera, Camera>(); // Camera -> Camera table
|
|
private Dictionary<Camera, Camera> m_RefractionCameras = new Dictionary<Camera, Camera>(); // Camera -> Camera table
|
|
|
|
private RenderTexture m_ReflectionTexture = null;
|
|
private RenderTexture m_RefractionTexture = null;
|
|
private WaterMode m_HardwareWaterSupport = WaterMode.Refractive;
|
|
private int m_OldReflectionTextureSize = 0;
|
|
private int m_OldRefractionTextureSize = 0;
|
|
|
|
private static bool s_InsideWater = false;
|
|
|
|
// This is called when it's known that the object will be rendered by some
|
|
// camera. We render reflections / refractions and do other updates here.
|
|
// Because the script executes in edit mode, reflections for the scene view
|
|
// camera will just work!
|
|
public void OnWillRenderObject()
|
|
{
|
|
if( !enabled || !renderer || !renderer.sharedMaterial || !renderer.enabled )
|
|
return;
|
|
|
|
Camera cam = Camera.current;
|
|
if( !cam )
|
|
return;
|
|
|
|
// Safeguard from recursive water reflections.
|
|
if( s_InsideWater )
|
|
return;
|
|
s_InsideWater = true;
|
|
|
|
// Actual water rendering mode depends on both the current setting AND
|
|
// the hardware support. There's no point in rendering refraction textures
|
|
// if they won't be visible in the end.
|
|
m_HardwareWaterSupport = FindHardwareWaterSupport();
|
|
WaterMode mode = GetWaterMode();
|
|
|
|
Camera reflectionCamera, refractionCamera;
|
|
CreateWaterObjects( cam, out reflectionCamera, out refractionCamera );
|
|
|
|
// find out the reflection plane: position and normal in world space
|
|
Vector3 pos = transform.position;
|
|
Vector3 normal = transform.up;
|
|
|
|
// Optionally disable pixel lights for reflection/refraction
|
|
int oldPixelLightCount = QualitySettings.pixelLightCount;
|
|
if( m_DisablePixelLights )
|
|
QualitySettings.pixelLightCount = 0;
|
|
|
|
UpdateCameraModes( cam, reflectionCamera );
|
|
UpdateCameraModes( cam, refractionCamera );
|
|
|
|
// Render reflection if needed
|
|
if( mode >= WaterMode.Reflective )
|
|
{
|
|
// Reflect camera around reflection plane
|
|
float d = -Vector3.Dot (normal, pos) - m_ClipPlaneOffset;
|
|
Vector4 reflectionPlane = new Vector4 (normal.x, normal.y, normal.z, d);
|
|
|
|
Matrix4x4 reflection = Matrix4x4.zero;
|
|
CalculateReflectionMatrix (ref reflection, reflectionPlane);
|
|
Vector3 oldpos = cam.transform.position;
|
|
Vector3 newpos = reflection.MultiplyPoint( oldpos );
|
|
reflectionCamera.worldToCameraMatrix = cam.worldToCameraMatrix * reflection;
|
|
|
|
// Setup oblique projection matrix so that near plane is our reflection
|
|
// plane. This way we clip everything below/above it for free.
|
|
Vector4 clipPlane = CameraSpacePlane( reflectionCamera, pos, normal, 1.0f );
|
|
reflectionCamera.projectionMatrix = cam.CalculateObliqueMatrix(clipPlane);
|
|
|
|
reflectionCamera.cullingMask = ~(1<<4) & m_ReflectLayers.value; // never render water layer
|
|
reflectionCamera.targetTexture = m_ReflectionTexture;
|
|
GL.SetRevertBackfacing (true);
|
|
reflectionCamera.transform.position = newpos;
|
|
Vector3 euler = cam.transform.eulerAngles;
|
|
reflectionCamera.transform.eulerAngles = new Vector3(-euler.x, euler.y, euler.z);
|
|
reflectionCamera.Render();
|
|
reflectionCamera.transform.position = oldpos;
|
|
GL.SetRevertBackfacing (false);
|
|
renderer.sharedMaterial.SetTexture( "_ReflectionTex", m_ReflectionTexture );
|
|
}
|
|
|
|
// Render refraction
|
|
if( mode >= WaterMode.Refractive )
|
|
{
|
|
refractionCamera.worldToCameraMatrix = cam.worldToCameraMatrix;
|
|
|
|
// Setup oblique projection matrix so that near plane is our reflection
|
|
// plane. This way we clip everything below/above it for free.
|
|
Vector4 clipPlane = CameraSpacePlane( refractionCamera, pos, normal, -1.0f );
|
|
refractionCamera.projectionMatrix = cam.CalculateObliqueMatrix(clipPlane);
|
|
|
|
refractionCamera.cullingMask = ~(1<<4) & m_RefractLayers.value; // never render water layer
|
|
refractionCamera.targetTexture = m_RefractionTexture;
|
|
refractionCamera.transform.position = cam.transform.position;
|
|
refractionCamera.transform.rotation = cam.transform.rotation;
|
|
refractionCamera.Render();
|
|
renderer.sharedMaterial.SetTexture( "_RefractionTex", m_RefractionTexture );
|
|
}
|
|
|
|
// Restore pixel light count
|
|
if( m_DisablePixelLights )
|
|
QualitySettings.pixelLightCount = oldPixelLightCount;
|
|
|
|
// Setup shader keywords based on water mode
|
|
switch( mode )
|
|
{
|
|
case WaterMode.Simple:
|
|
Shader.EnableKeyword( "WATER_SIMPLE" );
|
|
Shader.DisableKeyword( "WATER_REFLECTIVE" );
|
|
Shader.DisableKeyword( "WATER_REFRACTIVE" );
|
|
break;
|
|
case WaterMode.Reflective:
|
|
Shader.DisableKeyword( "WATER_SIMPLE" );
|
|
Shader.EnableKeyword( "WATER_REFLECTIVE" );
|
|
Shader.DisableKeyword( "WATER_REFRACTIVE" );
|
|
break;
|
|
case WaterMode.Refractive:
|
|
Shader.DisableKeyword( "WATER_SIMPLE" );
|
|
Shader.DisableKeyword( "WATER_REFLECTIVE" );
|
|
Shader.EnableKeyword( "WATER_REFRACTIVE" );
|
|
break;
|
|
}
|
|
|
|
s_InsideWater = false;
|
|
}
|
|
|
|
|
|
// Cleanup all the objects we possibly have created
|
|
void OnDisable()
|
|
{
|
|
if( m_ReflectionTexture ) {
|
|
DestroyImmediate( m_ReflectionTexture );
|
|
m_ReflectionTexture = null;
|
|
}
|
|
if( m_RefractionTexture ) {
|
|
DestroyImmediate( m_RefractionTexture );
|
|
m_RefractionTexture = null;
|
|
}
|
|
foreach (KeyValuePair<Camera, Camera> kvp in m_ReflectionCameras)
|
|
DestroyImmediate( (kvp.Value).gameObject );
|
|
m_ReflectionCameras.Clear();
|
|
foreach (KeyValuePair<Camera, Camera> kvp in m_RefractionCameras)
|
|
DestroyImmediate( (kvp.Value).gameObject );
|
|
m_RefractionCameras.Clear();
|
|
}
|
|
|
|
|
|
// This just sets up some matrices in the material; for really
|
|
// old cards to make water texture scroll.
|
|
void Update()
|
|
{
|
|
if( !renderer )
|
|
return;
|
|
Material mat = renderer.sharedMaterial;
|
|
if( !mat )
|
|
return;
|
|
|
|
Vector4 waveSpeed = mat.GetVector( "WaveSpeed" );
|
|
float waveScale = mat.GetFloat( "_WaveScale" );
|
|
Vector4 waveScale4 = new Vector4(waveScale, waveScale, waveScale * 0.4f, waveScale * 0.45f);
|
|
|
|
// Time since level load, and do intermediate calculations with doubles
|
|
double t = Time.timeSinceLevelLoad / 20.0;
|
|
Vector4 offsetClamped = new Vector4(
|
|
(float)System.Math.IEEERemainder(waveSpeed.x * waveScale4.x * t, 1.0),
|
|
(float)System.Math.IEEERemainder(waveSpeed.y * waveScale4.y * t, 1.0),
|
|
(float)System.Math.IEEERemainder(waveSpeed.z * waveScale4.z * t, 1.0),
|
|
(float)System.Math.IEEERemainder(waveSpeed.w * waveScale4.w * t, 1.0)
|
|
);
|
|
|
|
mat.SetVector( "_WaveOffset", offsetClamped );
|
|
mat.SetVector( "_WaveScale4", waveScale4 );
|
|
|
|
Vector3 waterSize = renderer.bounds.size;
|
|
Vector3 scale = new Vector3( waterSize.x*waveScale4.x, waterSize.z*waveScale4.y, 1 );
|
|
Matrix4x4 scrollMatrix = Matrix4x4.TRS( new Vector3(offsetClamped.x,offsetClamped.y,0), Quaternion.identity, scale );
|
|
mat.SetMatrix( "_WaveMatrix", scrollMatrix );
|
|
|
|
scale = new Vector3( waterSize.x*waveScale4.z, waterSize.z*waveScale4.w, 1 );
|
|
scrollMatrix = Matrix4x4.TRS( new Vector3(offsetClamped.z,offsetClamped.w,0), Quaternion.identity, scale );
|
|
mat.SetMatrix( "_WaveMatrix2", scrollMatrix );
|
|
}
|
|
|
|
private void UpdateCameraModes( Camera src, Camera dest )
|
|
{
|
|
if( dest == null )
|
|
return;
|
|
// set water camera to clear the same way as current camera
|
|
dest.clearFlags = src.clearFlags;
|
|
dest.backgroundColor = src.backgroundColor;
|
|
if( src.clearFlags == CameraClearFlags.Skybox )
|
|
{
|
|
Skybox sky = src.GetComponent(typeof(Skybox)) as Skybox;
|
|
Skybox mysky = dest.GetComponent(typeof(Skybox)) as Skybox;
|
|
if( !sky || !sky.material )
|
|
{
|
|
mysky.enabled = false;
|
|
}
|
|
else
|
|
{
|
|
mysky.enabled = true;
|
|
mysky.material = sky.material;
|
|
}
|
|
}
|
|
// update other values to match current camera.
|
|
// even if we are supplying custom camera&projection matrices,
|
|
// some of values are used elsewhere (e.g. skybox uses far plane)
|
|
dest.farClipPlane = src.farClipPlane;
|
|
dest.nearClipPlane = src.nearClipPlane;
|
|
dest.orthographic = src.orthographic;
|
|
dest.fieldOfView = src.fieldOfView;
|
|
dest.aspect = src.aspect;
|
|
dest.orthographicSize = src.orthographicSize;
|
|
}
|
|
|
|
// On-demand create any objects we need for water
|
|
private void CreateWaterObjects( Camera currentCamera, out Camera reflectionCamera, out Camera refractionCamera )
|
|
{
|
|
WaterMode mode = GetWaterMode();
|
|
|
|
reflectionCamera = null;
|
|
refractionCamera = null;
|
|
|
|
if( mode >= WaterMode.Reflective )
|
|
{
|
|
// Reflection render texture
|
|
if( !m_ReflectionTexture || m_OldReflectionTextureSize != m_TextureSize )
|
|
{
|
|
if( m_ReflectionTexture )
|
|
DestroyImmediate( m_ReflectionTexture );
|
|
m_ReflectionTexture = new RenderTexture( m_TextureSize, m_TextureSize, 16 );
|
|
m_ReflectionTexture.name = "__WaterReflection" + GetInstanceID();
|
|
m_ReflectionTexture.isPowerOfTwo = true;
|
|
m_ReflectionTexture.hideFlags = HideFlags.DontSave;
|
|
m_OldReflectionTextureSize = m_TextureSize;
|
|
}
|
|
|
|
// Camera for reflection
|
|
m_ReflectionCameras.TryGetValue(currentCamera, out reflectionCamera);
|
|
if (!reflectionCamera) // catch both not-in-dictionary and in-dictionary-but-deleted-GO
|
|
{
|
|
GameObject go = new GameObject( "Water Refl Camera id" + GetInstanceID() + " for " + currentCamera.GetInstanceID(), typeof(Camera), typeof(Skybox) );
|
|
reflectionCamera = go.camera;
|
|
reflectionCamera.enabled = false;
|
|
reflectionCamera.transform.position = transform.position;
|
|
reflectionCamera.transform.rotation = transform.rotation;
|
|
reflectionCamera.gameObject.AddComponent("FlareLayer");
|
|
go.hideFlags = HideFlags.HideAndDontSave;
|
|
m_ReflectionCameras[currentCamera] = reflectionCamera;
|
|
}
|
|
}
|
|
|
|
if( mode >= WaterMode.Refractive )
|
|
{
|
|
// Refraction render texture
|
|
if( !m_RefractionTexture || m_OldRefractionTextureSize != m_TextureSize )
|
|
{
|
|
if( m_RefractionTexture )
|
|
DestroyImmediate( m_RefractionTexture );
|
|
m_RefractionTexture = new RenderTexture( m_TextureSize, m_TextureSize, 16 );
|
|
m_RefractionTexture.name = "__WaterRefraction" + GetInstanceID();
|
|
m_RefractionTexture.isPowerOfTwo = true;
|
|
m_RefractionTexture.hideFlags = HideFlags.DontSave;
|
|
m_OldRefractionTextureSize = m_TextureSize;
|
|
}
|
|
|
|
// Camera for refraction
|
|
m_RefractionCameras.TryGetValue(currentCamera, out refractionCamera);
|
|
if (!refractionCamera) // catch both not-in-dictionary and in-dictionary-but-deleted-GO
|
|
{
|
|
GameObject go = new GameObject( "Water Refr Camera id" + GetInstanceID() + " for " + currentCamera.GetInstanceID(), typeof(Camera), typeof(Skybox) );
|
|
refractionCamera = go.camera;
|
|
refractionCamera.enabled = false;
|
|
refractionCamera.transform.position = transform.position;
|
|
refractionCamera.transform.rotation = transform.rotation;
|
|
refractionCamera.gameObject.AddComponent("FlareLayer");
|
|
go.hideFlags = HideFlags.HideAndDontSave;
|
|
m_RefractionCameras[currentCamera] = refractionCamera;
|
|
}
|
|
}
|
|
}
|
|
|
|
private WaterMode GetWaterMode()
|
|
{
|
|
if( m_HardwareWaterSupport < m_WaterMode )
|
|
return m_HardwareWaterSupport;
|
|
else
|
|
return m_WaterMode;
|
|
}
|
|
|
|
private WaterMode FindHardwareWaterSupport()
|
|
{
|
|
if( !SystemInfo.supportsRenderTextures || !renderer )
|
|
return WaterMode.Simple;
|
|
|
|
Material mat = renderer.sharedMaterial;
|
|
if( !mat )
|
|
return WaterMode.Simple;
|
|
|
|
string mode = mat.GetTag("WATERMODE", false);
|
|
if( mode == "Refractive" )
|
|
return WaterMode.Refractive;
|
|
if( mode == "Reflective" )
|
|
return WaterMode.Reflective;
|
|
|
|
return WaterMode.Simple;
|
|
}
|
|
|
|
// Extended sign: returns -1, 0 or 1 based on sign of a
|
|
private static float sgn(float a)
|
|
{
|
|
if (a > 0.0f) return 1.0f;
|
|
if (a < 0.0f) return -1.0f;
|
|
return 0.0f;
|
|
}
|
|
|
|
// Given position/normal of the plane, calculates plane in camera space.
|
|
private Vector4 CameraSpacePlane (Camera cam, Vector3 pos, Vector3 normal, float sideSign)
|
|
{
|
|
Vector3 offsetPos = pos + normal * m_ClipPlaneOffset;
|
|
Matrix4x4 m = cam.worldToCameraMatrix;
|
|
Vector3 cpos = m.MultiplyPoint( offsetPos );
|
|
Vector3 cnormal = m.MultiplyVector( normal ).normalized * sideSign;
|
|
return new Vector4( cnormal.x, cnormal.y, cnormal.z, -Vector3.Dot(cpos,cnormal) );
|
|
}
|
|
|
|
// Calculates reflection matrix around the given plane
|
|
private static void CalculateReflectionMatrix (ref Matrix4x4 reflectionMat, Vector4 plane)
|
|
{
|
|
reflectionMat.m00 = (1F - 2F*plane[0]*plane[0]);
|
|
reflectionMat.m01 = ( - 2F*plane[0]*plane[1]);
|
|
reflectionMat.m02 = ( - 2F*plane[0]*plane[2]);
|
|
reflectionMat.m03 = ( - 2F*plane[3]*plane[0]);
|
|
|
|
reflectionMat.m10 = ( - 2F*plane[1]*plane[0]);
|
|
reflectionMat.m11 = (1F - 2F*plane[1]*plane[1]);
|
|
reflectionMat.m12 = ( - 2F*plane[1]*plane[2]);
|
|
reflectionMat.m13 = ( - 2F*plane[3]*plane[1]);
|
|
|
|
reflectionMat.m20 = ( - 2F*plane[2]*plane[0]);
|
|
reflectionMat.m21 = ( - 2F*plane[2]*plane[1]);
|
|
reflectionMat.m22 = (1F - 2F*plane[2]*plane[2]);
|
|
reflectionMat.m23 = ( - 2F*plane[3]*plane[2]);
|
|
|
|
reflectionMat.m30 = 0F;
|
|
reflectionMat.m31 = 0F;
|
|
reflectionMat.m32 = 0F;
|
|
reflectionMat.m33 = 1F;
|
|
}
|
|
}
|