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Changed TAA Jitter method to include camera matrix in calculations #377

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Changed TAA Jitter method to include camera matrix in calculations #377

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39 changes: 9 additions & 30 deletions PostProcessing/Runtime/Utils/RuntimeUtilities.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -371,40 +371,19 @@ public static float Exp2(float x)
// https://github.com/playdeadgames/temporal/blob/master/Assets/Scripts/Extensions.cs
public static Matrix4x4 GetJitteredPerspectiveProjectionMatrix(Camera camera, Vector2 offset)
{
float vertical = Mathf.Tan(0.5f * Mathf.Deg2Rad * camera.fieldOfView);
float horizontal = vertical * camera.aspect;
float near = camera.nearClipPlane;
float far = camera.farClipPlane;

offset.x *= horizontal / (0.5f * camera.pixelWidth);
offset.y *= vertical / (0.5f * camera.pixelHeight);

float left = (offset.x - horizontal) * near;
float right = (offset.x + horizontal) * near;
float top = (offset.y + vertical) * near;
float bottom = (offset.y - vertical) * near;

var matrix = new Matrix4x4();
float near = camera.nearClipPlane;
float far = camera.farClipPlane;

matrix[0, 0] = (2f * near) / (right - left);
matrix[0, 1] = 0f;
matrix[0, 2] = (right + left) / (right - left);
matrix[0, 3] = 0f;
float vertical = Mathf.Tan(0.5f * Mathf.Deg2Rad * camera.fieldOfView) * near;
float horizontal = vertical * camera.aspect;

matrix[1, 0] = 0f;
matrix[1, 1] = (2f * near) / (top - bottom);
matrix[1, 2] = (top + bottom) / (top - bottom);
matrix[1, 3] = 0f;
offset.x *= horizontal / (0.5f * camera.pixelWidth);
offset.y *= vertical / (0.5f * camera.pixelHeight);

matrix[2, 0] = 0f;
matrix[2, 1] = 0f;
matrix[2, 2] = -(far + near) / (far - near);
matrix[2, 3] = -(2f * far * near) / (far - near);
var matrix = camera.projectionMatrix;

matrix[3, 0] = 0f;
matrix[3, 1] = 0f;
matrix[3, 2] = -1f;
matrix[3, 3] = 0f;
matrix[0, 2] += offset.x / horizontal;
matrix[1, 2] += offset.y / vertical;

return matrix;
}
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