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802f42e821
Remove unneeded include statements for host.h, add required ones and update the comments for the remaining include statements. Signed-off-by: Stefan Weil <sw@weilnetz.de>
54 lines
2.1 KiB
C
54 lines
2.1 KiB
C
/******************************************************************************
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** Filename: fpoint.h
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** Purpose: Abstract data type for 2D points (floating point coords)
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** Author: Dan Johnson
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**
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** (c) Copyright Hewlett-Packard Company, 1988.
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** (c) Copyright Hewlett-Packard Company, 1988.
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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** http://www.apache.org/licenses/LICENSE-2.0
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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******************************************************************************/
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#ifndef FPOINT_H
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#define FPOINT_H
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/**----------------------------------------------------------------------------
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Include Files and Type Defines
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----------------------------------------------------------------------------**/
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#include <cmath>
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#include <cstdio>
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/* define data structure to hold 2D points or vectors using floating point */
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typedef struct {
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float x, y;
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} FPOINT;
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using FVECTOR = FPOINT;
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/**----------------------------------------------------------------------------
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Macros
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----------------------------------------------------------------------------**/
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/* macros for computing miscellaneous functions of 2 points */
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#define XDelta(A, B) ((B).x - (A).x)
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#define YDelta(A, B) ((B).y - (A).y)
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#define SlopeFrom(A, B) (YDelta(A, B) / XDelta(A, B))
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#define AngleFrom(A, B) (atan2((double)YDelta(A, B), (double)XDelta(A, B)))
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#define XIntersectionOf(A, B, X) (SlopeFrom(A, B) * ((X)-A.x) + A.y)
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/*-------------------------------------------------------------------------
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Public Function Prototypes
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---------------------------------------------------------------------------*/
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float DistanceBetween(FPOINT A, FPOINT B);
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float NormalizedAngleFrom(FPOINT* Point1, FPOINT* Point2, float FullScale);
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#endif
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