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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,139 +1,154 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
|
|
||
| namespace SoftRender.Render | ||
| { | ||
| class Camera | ||
| { | ||
| private Vector4 m_Position; | ||
| private Vector4 m_target; | ||
| private Vector4 m_Up; | ||
|
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|
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| public Vector4 Position | ||
| { | ||
| get | ||
| { | ||
| return m_Position; | ||
| } | ||
| set | ||
| { | ||
| m_Position = value; | ||
| } | ||
| } | ||
|
|
||
| public Vector4 Target | ||
| { | ||
| get | ||
| { | ||
| return m_target; | ||
| } | ||
| set | ||
| { | ||
| m_target = value ; | ||
| } | ||
| } | ||
|
|
||
| public Vector4 Up | ||
| { | ||
| get | ||
| { | ||
| return m_Up; | ||
| } | ||
| set | ||
| { | ||
| m_Up = value; | ||
| } | ||
| } | ||
|
|
||
| public Matrix4x4 GetLookAt() | ||
| { | ||
| Matrix4x4 view = new Matrix4x4(1); | ||
|
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| Vector4 xAxis, yAxis, zAxis; | ||
|
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| zAxis = m_target - m_Position; | ||
| zAxis.Normalize(); | ||
| xAxis = Vector4.Cross(m_Up, m_Position); | ||
| xAxis.Normalize(); | ||
| yAxis = Vector4.Cross(zAxis, xAxis); | ||
| yAxis.Normalize(); | ||
|
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||
| view[0, 0] = xAxis.x; | ||
| view[1, 0] = xAxis.y; | ||
| view[2, 0] = xAxis.z; | ||
| view[3, 0] = -Vector4.Dot(xAxis, m_Position); | ||
|
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||
| view[0, 1] = yAxis.x; | ||
| view[1, 1] = yAxis.y; | ||
| view[2, 1] = yAxis.z; | ||
| view[3, 1] = -Vector4.Dot(yAxis, m_Position); | ||
|
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||
| view[0, 2] = zAxis.x; | ||
| view[1, 2] = zAxis.y; | ||
| view[2, 2] = zAxis.z; | ||
| view[3, 2] = -Vector4.Dot(zAxis, m_Position); | ||
|
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||
| view[0, 3] = 0.0f; | ||
| view[1, 3] = 0.0f; | ||
| view[2, 3] = 0.0f; | ||
| view[3, 3] = 1.0f; | ||
|
|
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| return view; | ||
| } | ||
|
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||
|
|
||
| public Matrix4x4 GetProject(float fov,float aspect,float zn,float zf) | ||
| { | ||
| Matrix4x4 project = new Matrix4x4(1); | ||
| project.SetZero(); | ||
| project[0, 0] = 1 / ((float)Math.Tan(fov * 0.5f) * aspect); | ||
| project[1, 1] = 1 / ((float)Math.Tan(fov * 0.5f)); | ||
| project[2, 2] = (zf + zn) / (zf - zn); | ||
| project[2, 3] = 1.0f; | ||
| project[3, 2] = 2 * (zn * zf) / (zn - zf); | ||
|
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| return project; | ||
| } | ||
|
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| public void Rotate(Vector4 position ,float x,float y) | ||
| { | ||
| m_Position = (Matrix4x4.RotateX(x) * Matrix4x4.RotateY(y)).LeftApply(position); | ||
| } | ||
|
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||
| public void MoveForward(float distance) | ||
| { | ||
| Vector4 dir = (m_target - m_Position); | ||
| float w = m_Position.w; | ||
| if (distance > 0 && dir.length < 1.5f) | ||
| { | ||
| return; | ||
| } | ||
|
|
||
| if (distance < 0 && dir.length > 30) | ||
| { | ||
| return; | ||
| } | ||
|
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| m_Position = m_Position + (dir.Normalize() * distance); | ||
| m_Position.w = w; | ||
| } | ||
|
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| public void MoveTheta(float r) | ||
| { | ||
| m_Position = m_Position * Matrix4x4.RotateX(r); | ||
| } | ||
|
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| public void MovePhi(float r) | ||
| { | ||
| m_Position = m_Position * Matrix4x4.RotateY(r); | ||
| } | ||
|
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| } | ||
|
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| //相机类 | ||
| class Camera | ||
| { | ||
| private Vector4 mPosition; | ||
| private Vector4 mTarget; | ||
| private Vector4 mUp; | ||
|
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||
| /// <summary> | ||
| /// 相机位置 | ||
| /// </summary> | ||
| public Vector4 Position | ||
| { | ||
| get { return mPosition; } | ||
| set { mPosition = value; } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// 目标 | ||
| /// </summary> | ||
| public Vector4 Target | ||
| { | ||
| get { return mTarget; } | ||
| set { mTarget = value; } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// 上方 | ||
| /// </summary> | ||
| public Vector4 Up | ||
| { | ||
| get { return mUp; } | ||
| set { mUp = value; } | ||
| } | ||
|
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||
| /// <summary> | ||
| /// 观察矩阵 | ||
| /// </summary> | ||
| /// <returns></returns> | ||
| public Matrix4x4 GetLookAt() | ||
| { | ||
| Matrix4x4 view = new Matrix4x4(1); | ||
| Vector4 xaxis, yaxis, zaxis; | ||
|
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||
| //法向量 z | ||
| zaxis = mTarget - mPosition; | ||
| zaxis.Normalize(); | ||
| xaxis = Vector4.Cross(mUp, zaxis); | ||
| xaxis.Normalize(); | ||
| yaxis = Vector4.Cross(zaxis, xaxis); | ||
| yaxis.Normalize(); | ||
|
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||
| view.matrix[0, 0] = xaxis.X; | ||
| view.matrix[1, 0] = xaxis.Y; | ||
| view.matrix[2, 0] = xaxis.Z; | ||
| view.matrix[3, 0] = -Vector4.Dot(xaxis, mPosition); | ||
|
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| view.matrix[0, 1] = yaxis.X; | ||
| view.matrix[1, 1] = yaxis.Y; | ||
| view.matrix[2, 1] = yaxis.Z; | ||
| view.matrix[3, 1] = -Vector4.Dot(yaxis, mPosition); | ||
|
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| view.matrix[0, 2] = zaxis.X; | ||
| view.matrix[1, 2] = zaxis.Y; | ||
| view.matrix[2, 2] = zaxis.Z; | ||
| view.matrix[3, 2] = -Vector4.Dot(zaxis, mPosition); | ||
|
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| view.matrix[0, 3] = view.matrix[1, 3] = view.matrix[2, 3] = 0.0f; | ||
| view.matrix[3, 3] = 1.0f; | ||
|
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| return view; | ||
| } | ||
|
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||
| /// <summary> | ||
| /// 投影矩阵 | ||
| /// </summary> | ||
| /// <param name="fov">y方向的视角</param> | ||
| /// <param name="aspect">纵横比</param> | ||
| /// <param name="zn">近裁剪 平面到原点的距离</param> | ||
| /// <param name="zf">远裁剪 平面到原点的距离</param> | ||
| /// <returns></returns> | ||
| public Matrix4x4 GetProject(float fov, float aspect, float zn, float zf) | ||
| { | ||
| Matrix4x4 project = new Matrix4x4(1); | ||
| project.SetZero(); | ||
| project.matrix[0, 0] = 1 / ((float)Math.Tan(fov * 0.5f) * aspect); | ||
| project.matrix[1, 1] = 1 / (float)Math.Tan(fov * 0.5f); | ||
| project.matrix[2, 2] = (zf + zn) / (zf - zn); | ||
| project.matrix[2, 3] = 1.0f; | ||
| project.matrix[3, 2] = 2 * (zn * zf) / (zn - zf); | ||
|
|
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| return project; | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// 旋转摄像机 | ||
| /// </summary> | ||
| /// <param name="position"></param> | ||
| /// <param name="x"></param> | ||
| /// <param name="y"></param> | ||
| public void Rotate(Vector4 position, float x, float y) | ||
| { | ||
| mPosition = (Matrix4x4.RotateX(x) * Matrix4x4.RotateY(y)).LeftApply(position); | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// 改变相机的位置 | ||
| /// </summary> | ||
| /// <param name="pos"></param> | ||
| public void UpdatePosition(Vector4 pos) | ||
| { | ||
| mPosition = pos; | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// 前后移动摄像机 | ||
| /// </summary> | ||
| /// <param name="distance">移动的距离</param> | ||
| public void MoveForward(float distance) | ||
| { | ||
| Vector4 dir = (mTarget - mPosition); | ||
| float w = mPosition.W; | ||
| if (distance > 0 && dir.Length < 1.5f) | ||
| return; | ||
|
|
||
| if (distance < 0 && dir.Length > 30) | ||
| return; | ||
|
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| mPosition = mPosition + (dir.Normalize() * distance); | ||
| mPosition.W = w; | ||
| } | ||
|
|
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| /// <summary> | ||
| /// 绕X轴旋转 | ||
| /// </summary> | ||
| /// <param name="r"></param> | ||
| public void MoveTheta(float r) | ||
| { | ||
| mPosition = mPosition * Matrix4x4.RotateX(r); | ||
| } | ||
|
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| /// <summary> | ||
| /// 绕y轴旋转 | ||
| /// </summary> | ||
| /// <param name="r"></param> | ||
| public void MovePhi(float r) | ||
| { | ||
| mPosition = mPosition * Matrix4x4.RotateY(r); | ||
| } | ||
| } | ||
| } |
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