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Add inverse scale func
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parent
22e830b942
commit
9421155671
2 changed files with 36 additions and 7 deletions
13
raycastlib.h
13
raycastlib.h
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@ -275,6 +275,8 @@ Unit degreesToUnitsAngle(int16_t degrees);
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///< Computes the change in size of an object due to perspective.
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Unit perspectiveScale(Unit originalSize, Unit distance);
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Unit perspectiveScaleInverse(Unit originalSize, Unit scaledSize);
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/**
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Casts rays for given camera view and for each hit calls a user provided
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function.
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@ -1228,6 +1230,9 @@ Unit coordStep = 1;
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PIXEL_FUNCTION(&p);
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++y;
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p.depth -= _horizontalDepthStep;
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if (p.depth < 0) // just in case
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p.depth = 0;
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}
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}
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@ -1379,6 +1384,14 @@ Unit perspectiveScale(Unit originalSize, Unit distance)
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: 0;
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}
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Unit perspectiveScaleInverse(Unit originalSize, Unit scaledSize)
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{
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return scaledSize != 0 ?
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(originalSize * UNITS_PER_SQUARE) /
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((VERTICAL_FOV * 2 * scaledSize) / UNITS_PER_SQUARE)
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: 0;
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}
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void moveCameraWithCollision(Camera *camera, Vector2D planeOffset,
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Unit heightOffset, ArrayFunction floorHeightFunc,
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ArrayFunction ceilingHeightFunc, int8_t computeHeight, int8_t force)
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30
test.c
30
test.c
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@ -6,6 +6,9 @@
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#define RAYCASTLIB_PROFILE
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#define HORIZONTAL_FOV UNITS_PER_SQUARE / 2
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#define PIXEL_FUNCTION pixelFunc
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#include <stdio.h>
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#include "raycastlib.h"
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#include <sys/time.h>
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@ -63,7 +66,7 @@ int testSingleRay(Unit startX, Unit startY, Unit dirX, Unit dirY,
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}
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int testSingleMapping(Unit posX, Unit posY, Unit posZ, uint32_t resX,
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uint32_t resY, Unit camX, Unit camY, Unit camZ, Unit camDir, Unit fov,
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uint32_t resY, Unit camX, Unit camY, Unit camZ, Unit camDir,
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Unit expectX, Unit expectY, Unit expectZ)
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{
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int result;
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@ -76,7 +79,6 @@ int testSingleMapping(Unit posX, Unit posY, Unit posZ, uint32_t resX,
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c.position.y = camY;
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c.direction = camDir;
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c.height = camZ;
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c.fovAngle = fov;
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Vector2D pos;
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Unit height;
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@ -151,7 +153,6 @@ void benchmarkMapping()
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c.position.y = UNITS_PER_SQUARE * 2;
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c.direction = UNITS_PER_SQUARE / 8;
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c.height = 0;
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c.fovAngle = UNITS_PER_SQUARE / 2;
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PixelInfo p;
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@ -172,7 +173,7 @@ void benchmarkMapping()
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}
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}
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void pixelFunc(PixelInfo p)
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void pixelFunc(PixelInfo *p)
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{
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}
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@ -186,7 +187,6 @@ void benchmarkRender()
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c.position.y = 12;
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c.direction = 100;
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c.height = 200;
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c.fovAngle = UNITS_PER_SQUARE / 3;
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RayConstraints constraints;
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@ -237,6 +237,23 @@ int main()
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16))
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return 1;
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printf("testing perspective scale...\n");
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for (Unit i = 1; i < 100; ++i)
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{
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Unit size = i * 3;
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Unit distance = i * 6 + 200;
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Unit scaled = perspectiveScale(size,distance);
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Unit distance2 = perspectiveScaleInverse(size,scaled);
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if (absVal(distance - distance2 > 2))
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printf("ERROR: distance: %d, distance inverse: %d\n",distance,distance2);
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}
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printf("OK\n");
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/*
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if (!testSingleMapping(
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-UNITS_PER_SQUARE,
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0,
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@ -247,13 +264,12 @@ int main()
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0,
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0,
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UNITS_PER_SQUARE / 2,
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UNITS_PER_SQUARE / 4,
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640,
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0,
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1024
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))
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return -1;
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*/
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printf("benchmark:\n");
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long t;
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