void RenderToReflectionMap()
{
// reflection plane's position and normal in world space
Vector3 pos = m_WaterPlane.transform.position;
Vector3 normal = m_WaterPlane.transform.up;
// 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;
IW3DUtils.CalculateReflectionMatrix(ref reflection, reflectionPlane);
Camera cam = GetComponent <Camera> ();
Vector3 oldpos = cam.transform.position;
Vector3 newpos = reflection.MultiplyPoint(oldpos);
m_CamReflection.worldToCameraMatrix = cam.worldToCameraMatrix * reflection;
// render objects up side of water plane
Vector4 clipPlane = IW3DUtils.CameraSpacePlane(m_CamReflection, pos, normal, 1f, m_ClipPlaneOffset);
m_CamReflection.projectionMatrix = cam.CalculateObliqueMatrix(clipPlane);
GL.SetRevertBackfacing(true);
m_CamReflection.transform.position = newpos;
Vector3 euler = cam.transform.eulerAngles;
m_CamReflection.transform.eulerAngles = new Vector3(-euler.x, euler.y, euler.z);
m_CamReflection.Render();
m_CamReflection.transform.position = oldpos;
GL.SetRevertBackfacing(false);
}
void Start()
{
m_WaterForceLayer = 1 << LayerMask.NameToLayer("Ignore Raycast");
IW3DUtils.CreateGridPlane(m_WaterPlane, m_MatShading, m_Grid, m_Width, m_Width, new Vector3(-m_Width / 2f, 0, -m_Width / 2f));
m_CamOrth = IW3DUtils.CreateOrthographicCamera(m_WaterPlane.transform, m_WaterForceLayer);
CreateInternalMaps();
CreateInternalCameras(gameObject.transform);
m_CamOrth.targetTexture = m_RTHeightmaps[1];
}
void RenderToRefractionMap()
{
Vector3 pos = m_WaterPlane.transform.position;
Vector3 normal = m_WaterPlane.transform.up;
Camera cam = GetComponent <Camera> ();
m_CamRefraction.worldToCameraMatrix = cam.worldToCameraMatrix;
// render objects bottom side of water plane
Vector4 clipPlane = IW3DUtils.CameraSpacePlane(m_CamRefraction, pos, normal, -1f, m_ClipPlaneOffset);
m_CamRefraction.projectionMatrix = cam.CalculateObliqueMatrix(clipPlane);
m_CamRefraction.transform.position = cam.transform.position;
m_CamRefraction.transform.rotation = cam.transform.rotation;
m_CamRefraction.Render();
}
void Update()
{
if (!enabled)
{
return;
}
// reflection and refraction rendering
Camera cam = GetComponent <Camera>();
if (cam)
{
IW3DUtils.SyncCameraParameters(cam, m_CamReflection);
IW3DUtils.SyncCameraParameters(cam, m_CamRefraction);
RenderToReflectionMap();
RenderToRefractionMap();
}
// ripple
UpdateCore();
UpdateGPUParameters();
}
