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240 lines
8.3 KiB
C#
240 lines
8.3 KiB
C#
// ClassicalSharp copyright 2014-2016 UnknownShadow200 | Licensed under MIT
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using System;
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using System.Drawing;
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using ClassicalSharp.Entities;
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using OpenTK;
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using OpenTK.Input;
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namespace ClassicalSharp {
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public abstract class Camera {
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protected Game game;
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public abstract Matrix4 GetProjection( out Matrix4 heldBlockProj );
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public abstract Matrix4 GetView( double delta );
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/// <summary> Calculates the location of the camera's position in the world
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/// based on the entity's eye position. </summary>
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public abstract Vector3 GetCameraPos( Vector3 eyePos );
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/// <summary> Calculates the yaw and pitch of the camera in radians. </summary>
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public abstract Vector2 GetCameraOrientation();
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/// <summary> Whether this camera is using a third person perspective. </summary>
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/// <remarks> This causes the local player to be renderered if true. </remarks>
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public abstract bool IsThirdPerson { get; }
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public virtual void Tick( double elapsed ) { }
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public virtual bool DoZoom( float deltaPrecise ) { return false; }
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public abstract void RegrabMouse();
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/// <summary> Calculates the picked block based on the camera's current position. </summary>
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public virtual void GetPickedBlock( PickedPos pos ) { }
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protected float AdjustPitch( float value ) {
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if( value >= 90.0f && value <= 90.1f ) return 90.1f * Utils.Deg2Rad;
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if( value >= 89.9f && value <= 90.0f ) return 89.9f * Utils.Deg2Rad;
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if( value >= 270.0f && value <= 270.1f ) return 270.1f * Utils.Deg2Rad;
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if( value >= 269.9f && value <= 270.0f ) return 269.9f * Utils.Deg2Rad;
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return value * Utils.Deg2Rad;
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}
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}
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public abstract class PerspectiveCamera : Camera {
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protected LocalPlayer player;
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protected Matrix4 tiltMatrix;
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public PerspectiveCamera( Game game ) {
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this.game = game;
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player = game.LocalPlayer;
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tiltMatrix = Matrix4.Identity;
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}
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public override Matrix4 GetProjection( out Matrix4 heldBlockProj ) {
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float fovy = game.Fov * Utils.Deg2Rad;
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float aspectRatio = (float)game.Width / game.Height;
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float zNear = game.Graphics.MinZNear;
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heldBlockProj = Matrix4.CreatePerspectiveFieldOfView( 70 * Utils.Deg2Rad,
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aspectRatio, zNear, game.ViewDistance );
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return Matrix4.CreatePerspectiveFieldOfView( fovy, aspectRatio, zNear, game.ViewDistance );
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}
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public override void GetPickedBlock( PickedPos pos ) {
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Vector3 dir = Utils.GetDirVector( player.HeadYawRadians,
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AdjustPitch( player.PitchDegrees ) );
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Vector3 eyePos = player.EyePosition;
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float reach = game.LocalPlayer.ReachDistance;
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Picking.CalculatePickedBlock( game, eyePos, dir, reach, pos );
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}
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internal Point previous, delta;
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void CentreMousePosition() {
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if( !game.Focused ) return;
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Point current = game.DesktopCursorPos;
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delta = new Point( current.X - previous.X, current.Y - previous.Y );
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Point topLeft = game.PointToScreen( Point.Empty );
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int cenX = topLeft.X + game.Width / 2;
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int cenY = topLeft.Y + game.Height / 2;
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game.DesktopCursorPos = new Point( cenX, cenY );
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// Fixes issues with large DPI displays on Windows >= 8.0.
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previous = game.DesktopCursorPos;
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}
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public override void RegrabMouse() {
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if( !game.Exists ) return;
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Point topLeft = game.PointToScreen( Point.Empty );
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int cenX = topLeft.X + game.Width / 2;
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int cenY = topLeft.Y + game.Height / 2;
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game.DesktopCursorPos = new Point( cenX, cenY );
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previous = new Point( cenX, cenY );
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delta = Point.Empty;
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}
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static readonly float sensiFactor = 0.0002f / 3 * Utils.Rad2Deg;
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private void UpdateMouseRotation() {
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float sensitivity = sensiFactor * game.MouseSensitivity;
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float yaw = player.nextYaw + delta.X * sensitivity;
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float yAdj = game.InvertMouse ? -delta.Y * sensitivity : delta.Y * sensitivity;
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float pitch = player.nextPitch + yAdj;
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LocationUpdate update = LocationUpdate.MakeOri( yaw, pitch );
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// Need to make sure we don't cross the vertical axes, because that gets weird.
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if( update.Pitch >= 90 && update.Pitch <= 270 )
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update.Pitch = player.nextPitch < 180 ? 89.9f : 270.1f;
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game.LocalPlayer.SetLocation( update, true );
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}
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public override void Tick( double elapsed ) {
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if( game.ActiveScreen.HandlesAllInput ) return;
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CentreMousePosition();
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UpdateMouseRotation();
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}
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protected float bobYOffset = 0, tilt = 0;
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bool finishedTilt = true;
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protected void CalcViewBobbing( double delta ) {
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LocalPlayer p = game.LocalPlayer;
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if( !game.ViewBobbing || !game.LocalPlayer.onGround ) {
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// When player leaves the ground, still want to finish the current bob cycle.
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if( finishedTilt || FinishTilt() ) return;
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}
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tilt = p.anim.tilt;
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tiltMatrix = Matrix4.RotateZ( tilt );
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bobYOffset = p.anim.bobYOffset * (2.0f/2.5f);
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finishedTilt = false;
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}
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bool FinishTilt() {
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LocalPlayer p = game.LocalPlayer;
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if( Math.Sign( tilt ) == Math.Sign( p.anim.tilt ) ) return false;
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tiltMatrix = Matrix4.Identity;
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bobYOffset = 0;
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finishedTilt = true;
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return true;
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}
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}
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public class ThirdPersonCamera : PerspectiveCamera {
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public ThirdPersonCamera( Game window ) : base( window ) {
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}
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public override Vector2 GetCameraOrientation() {
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return new Vector2( player.HeadYawRadians, player.PitchRadians );
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}
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float dist = 3;
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public override bool DoZoom( float deltaPrecise ) {
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dist = Math.Max( dist - deltaPrecise, 2 );
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return true;
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}
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public override Matrix4 GetView( double delta ) {
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CalcViewBobbing( delta );
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Vector3 eyePos = player.EyePosition;
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eyePos.Y += bobYOffset;
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Vector3 dir = -Utils.GetDirVector( player.HeadYawRadians,
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AdjustPitch( player.PitchDegrees ) );
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Picking.ClipCameraPos( game, eyePos, dir, dist, game.CameraClipPos );
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Vector3 cameraPos = game.CameraClipPos.IntersectPoint;
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return Matrix4.LookAt( cameraPos, eyePos, Vector3.UnitY ) * tiltMatrix;
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}
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public override bool IsThirdPerson { get { return true; } }
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public override Vector3 GetCameraPos( Vector3 eyePos ) {
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Vector3 dir = -Utils.GetDirVector( player.HeadYawRadians,
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AdjustPitch( player.PitchDegrees ) );
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Picking.ClipCameraPos( game, eyePos, dir, dist, game.CameraClipPos );
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return game.CameraClipPos.IntersectPoint;
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}
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}
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public class ForwardThirdPersonCamera : PerspectiveCamera {
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public ForwardThirdPersonCamera( Game window ) : base( window ) {
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}
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public override Vector2 GetCameraOrientation() {
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return new Vector2( player.HeadYawRadians, -player.PitchRadians );
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}
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float dist = 3;
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public override bool DoZoom( float deltaPrecise ) {
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dist = Math.Max( dist - deltaPrecise, 2 );
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return true;
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}
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public override Matrix4 GetView( double delta ) {
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CalcViewBobbing( delta );
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Vector3 eyePos = player.EyePosition;
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eyePos.Y += bobYOffset;
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Vector3 dir = Utils.GetDirVector( player.HeadYawRadians,
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AdjustPitch( player.PitchDegrees ) );
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Picking.ClipCameraPos( game, eyePos, dir, dist, game.CameraClipPos );
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Vector3 cameraPos = game.CameraClipPos.IntersectPoint;
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return Matrix4.LookAt( cameraPos, eyePos, Vector3.UnitY ) * tiltMatrix;
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}
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public override bool IsThirdPerson { get { return true; } }
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public override Vector3 GetCameraPos( Vector3 eyePos ) {
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Vector3 dir = Utils.GetDirVector( player.HeadYawRadians,
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AdjustPitch( player.PitchDegrees ) );
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Picking.ClipCameraPos( game, eyePos, dir, dist, game.CameraClipPos );
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return game.CameraClipPos.IntersectPoint;
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}
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}
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public class FirstPersonCamera : PerspectiveCamera {
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public FirstPersonCamera( Game window ) : base( window ) {
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}
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public override Vector2 GetCameraOrientation() {
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return new Vector2( player.HeadYawRadians, player.PitchRadians );
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}
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public override Matrix4 GetView( double delta ) {
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CalcViewBobbing( delta );
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Vector3 eyePos = player.EyePosition;
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eyePos.Y += bobYOffset;
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Vector3 cameraDir = Utils.GetDirVector( player.HeadYawRadians,
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AdjustPitch( player.PitchDegrees ) );
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return Matrix4.LookAt( eyePos, eyePos + cameraDir, Vector3.UnitY ) * tiltMatrix;
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}
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public override bool IsThirdPerson { get { return false; } }
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public override Vector3 GetCameraPos( Vector3 eyePos ) {
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return eyePos;
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}
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}
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}
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