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Parametrize macro
This commit is contained in:
Miloslav Číž
parent
bfb5e5bf1e
commit
d0f504bc5d
2 changed files with 147 additions and 66 deletions
128
small3dlib.h
128
small3dlib.h
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@ -274,65 +274,6 @@ typedef uint16_t S3L_Index;
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#define S3L_HALF_RESOLUTION_X (S3L_RESOLUTION_X >> 1)
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#define S3L_HALF_RESOLUTION_Y (S3L_RESOLUTION_Y >> 1)
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#define S3L_PROJECTION_PLANE_HEIGHT\
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((S3L_RESOLUTION_Y * S3L_FRACTIONS_PER_UNIT * 2) / S3L_RESOLUTION_X)
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/** Predefined vertices of a cube to simply insert in an array. These come with
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S3L_CUBE_TRIANGLES and S3L_CUBE_TEXCOORDS. */
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#define S3L_CUBE_VERTICES\
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/* 0 front, bottom, right */\
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S3L_FRACTIONS_PER_UNIT/2,-S3L_FRACTIONS_PER_UNIT/2,-S3L_FRACTIONS_PER_UNIT/2,\
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/* 1 front, bottom, left */\
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-S3L_FRACTIONS_PER_UNIT/2,-S3L_FRACTIONS_PER_UNIT/2,-S3L_FRACTIONS_PER_UNIT/2,\
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/* 2 front, top, right */\
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S3L_FRACTIONS_PER_UNIT/2,S3L_FRACTIONS_PER_UNIT/2,-S3L_FRACTIONS_PER_UNIT/2,\
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/* 3 front, top, left */\
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-S3L_FRACTIONS_PER_UNIT/2,S3L_FRACTIONS_PER_UNIT/2,-S3L_FRACTIONS_PER_UNIT/2,\
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/* 4 back, bottom, right */\
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S3L_FRACTIONS_PER_UNIT/2,-S3L_FRACTIONS_PER_UNIT/2,S3L_FRACTIONS_PER_UNIT/2,\
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/* 5 back, bottom, left */\
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-S3L_FRACTIONS_PER_UNIT/2,-S3L_FRACTIONS_PER_UNIT/2,S3L_FRACTIONS_PER_UNIT/2,\
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/* 6 back, top, right */\
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S3L_FRACTIONS_PER_UNIT/2,S3L_FRACTIONS_PER_UNIT/2,S3L_FRACTIONS_PER_UNIT/2,\
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/* 7 back, top, left */\
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-S3L_FRACTIONS_PER_UNIT/2,S3L_FRACTIONS_PER_UNIT/2,S3L_FRACTIONS_PER_UNIT/2
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#define S3L_CUBE_VERTEX_COUNT 8
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/** Predefined triangle indices of a cube, to be used with S3L_CUBE_VERTICES
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and S3L_CUBE_TEXCOORDS. */
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#define S3L_CUBE_TRIANGLES\
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0, 3, 2, /* front */\
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0, 1, 3,\
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4, 0, 2, /* right */\
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4, 2, 6,\
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5, 4, 6, /* back */\
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6, 7, 5,\
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7, 3, 1, /* left */\
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7, 1, 5,\
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3, 6, 2, /* top */\
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3, 7, 6,\
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4, 1, 0, /* bottom */\
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4, 5, 1
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#define S3L_CUBE_TRIANGLE_COUNT 12
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/** Predefined texture coordinates of a cube, corresponding to triangles (NOT
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vertices), to be used with S3L_CUBE_VERTICES and S3L_CUBE_TRIANGLES. */
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#define S3L_CUBE_TEXCOORDS(m)\
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m,m, 0,0, m,0,\
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m,m, 0,m, 0,0,\
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m,0, m,m, 0,m,\
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m,0, 0,m, 0,0,\
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0,0, m,0, m,m,\
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m,m, 0,m, 0,0,\
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0,m, 0,0, m,0,\
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0,m, m,0, m,m,\
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m,m, 0,0, m,0,\
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m,m, 0,m, 0,0,\
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0,m, m,0, m,m,\
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0,m, 0,0, m,0
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/** Vector that consists of four scalars and can represent homogenous
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coordinates, but is generally also used as Vec3 and Vec2. */
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typedef struct
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@ -536,6 +477,8 @@ static inline S3L_Unit S3L_interpolateByUnitFrom0(
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S3L_Unit v2,
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S3L_Unit t);
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static inline S3L_Unit S3L_distanceManhattan(S3L_Vec4 a, S3L_Vec4 b);
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/** Returns a value interpolated between the three triangle vertices based on
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barycentric coordinates. */
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static inline S3L_Unit S3L_interpolateBarycentric(
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@ -574,9 +517,68 @@ void S3L_stencilBufferClear();
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static inline void S3L_rotate2DPoint(S3L_Unit *x, S3L_Unit *y, S3L_Unit angle);
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/** Predefined vertices of a cube to simply insert in an array. These come with
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S3L_CUBE_TRIANGLES and S3L_CUBE_TEXCOORDS. */
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#define S3L_CUBE_VERTICES(m)\
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/* 0 front, bottom, right */\
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m/2, -m/2, -m/2,\
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/* 1 front, bottom, left */\
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-m/2, -m/2, -m/2,\
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/* 2 front, top, right */\
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m/2, m/2, -m/2,\
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/* 3 front, top, left */\
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-m/2, m/2, -m/2,\
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/* 4 back, bottom, right */\
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m/2, -m/2, m/2,\
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/* 5 back, bottom, left */\
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-m/2, -m/2, m/2,\
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/* 6 back, top, right */\
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m/2, m/2, m/2,\
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/* 7 back, top, left */\
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-m/2, m/2, m/2
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#define S3L_CUBE_VERTEX_COUNT 8
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/** Predefined triangle indices of a cube, to be used with S3L_CUBE_VERTICES
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and S3L_CUBE_TEXCOORDS. */
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#define S3L_CUBE_TRIANGLES\
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0, 3, 2, /* front */\
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0, 1, 3,\
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4, 0, 2, /* right */\
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4, 2, 6,\
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5, 4, 6, /* back */\
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6, 7, 5,\
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7, 3, 1, /* left */\
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7, 1, 5,\
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3, 6, 2, /* top */\
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3, 7, 6,\
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4, 1, 0, /* bottom */\
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4, 5, 1
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#define S3L_CUBE_TRIANGLE_COUNT 12
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/** Predefined texture coordinates of a cube, corresponding to triangles (NOT
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vertices), to be used with S3L_CUBE_VERTICES and S3L_CUBE_TRIANGLES. */
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#define S3L_CUBE_TEXCOORDS(m)\
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m,m, 0,0, m,0,\
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m,m, 0,m, 0,0,\
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m,0, m,m, 0,m,\
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m,0, 0,m, 0,0,\
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0,0, m,0, m,m,\
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m,m, 0,m, 0,0,\
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0,m, 0,0, m,0,\
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0,m, m,0, m,m,\
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m,m, 0,0, m,0,\
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m,m, 0,m, 0,0,\
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0,m, m,0, m,m,\
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0,m, 0,0, m,0
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//=============================================================================
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// privates
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#define S3L_PROJECTION_PLANE_HEIGHT\
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((S3L_RESOLUTION_Y * S3L_FRACTIONS_PER_UNIT * 2) / S3L_RESOLUTION_X)
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#if S3L_Z_BUFFER == 1
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#define S3L_COMPUTE_DEPTH 1
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#define S3L_MAX_DEPTH 2147483647
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@ -836,6 +838,14 @@ S3L_Unit S3L_interpolateFrom0(S3L_Unit v2, S3L_Unit t, S3L_Unit tMax)
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return (v2 * t) / tMax;
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}
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S3L_Unit S3L_distanceManhattan(S3L_Vec4 a, S3L_Vec4 b)
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{
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return
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S3L_abs(a.x - b.x) +
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S3L_abs(a.y - b.y) +
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S3L_abs(a.z - b.z);
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}
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void S3L_mat4Xmat4(S3L_Mat4 *m1, S3L_Mat4 *m2)
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{
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S3L_Mat4 mat1;
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85
testSDL.c
85
testSDL.c
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@ -23,20 +23,22 @@
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#include "small3dlib.h"
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#include "houseTexture.h"
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#include "house.h"
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int32_t offScreenPixels = 0;
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const S3L_Unit ver[] = { S3L_CUBE_VERTICES };
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const S3L_Unit ver[] = { S3L_CUBE_VERTICES(S3L_FRACTIONS_PER_UNIT) };
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const S3L_Index tri[] = { S3L_CUBE_TRIANGLES };
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const S3L_Unit tex_coords[] = { S3L_CUBE_TEXCOORDS(16) };
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S3L_Model3D models[2];
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S3L_Scene scene;
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uint8_t houseVertexLighting[127];
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int8_t keys[256];
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const uint8_t testTexture[] =
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/*
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{
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2,2,2,0,0,0,2,2,2,2,0,0,0,2,2,2,
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2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
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@ -55,7 +57,7 @@ const uint8_t testTexture[] =
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2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
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2,2,2,0,0,0,2,2,2,2,0,0,0,2,2,2
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};
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*/
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/*
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{
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0,1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,
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1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,
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@ -73,6 +75,7 @@ const uint8_t testTexture[] =
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1,2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,
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2,0,1,2,0,1,2,0,1,2,0,1,2,0,1,2
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};
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*/
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uint32_t pixels[S3L_RESOLUTION_X * S3L_RESOLUTION_Y];
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@ -126,8 +129,19 @@ void houseTex(int32_t u, int32_t v, uint8_t *r, uint8_t *g, uint8_t *b)
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*b = houseTexture[index + 2];
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}
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int l0, l1, l2;
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int previousTriangle = 255;
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void drawPixel(S3L_PixelInfo *p)
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{
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if (p->triangleIndex != previousTriangle)
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{
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l0 = houseVertexLighting[houseTriangleIndices[p->triangleIndex * 3]];
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l1 = houseVertexLighting[houseTriangleIndices[p->triangleIndex * 3 + 1]];
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l2 = houseVertexLighting[houseTriangleIndices[p->triangleIndex * 3 + 2]];
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previousTriangle = p->triangleIndex;
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}
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if (p->x < 0 || p ->x >= S3L_RESOLUTION_X || p->y < 0 || p->y >= S3L_RESOLUTION_Y)
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{
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offScreenPixels++;
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@ -185,7 +199,26 @@ if (p->modelIndex != 0)
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(u / ((float) S3L_FRACTIONS_PER_UNIT)) * HOUSE_TEXTURE_WIDTH,
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(v / ((float) S3L_FRACTIONS_PER_UNIT)) * HOUSE_TEXTURE_HEIGHT,
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&r,&g,&b);
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setPixel(p->x,p->y,r,g,b);
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uint8_t l = S3L_interpolateBarycentric(l0,l1,l2,
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p->barycentric[0],
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p->barycentric[1],
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p->barycentric[2]);
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l = 255 - l;
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l /= 2;
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int16_t clampTmp = r - l;
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r = clampTmp >= 0 ? clampTmp : 0;
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clampTmp = g - l;
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g = clampTmp >= 0 ? clampTmp : 0;
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clampTmp = b - l;
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b = clampTmp >= 0 ? clampTmp : 0;
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setPixel(p->x,p->y,r,g,b);
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}
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else
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{
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@ -223,6 +256,39 @@ clock_t nextT;
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int fps = 0;
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void recomputeLight()
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{
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S3L_Mat4 m;
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S3L_makeWorldMatrix(scene.models[1].transform,&m);
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int radius = S3L_FRACTIONS_PER_UNIT * 12;
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for (int i = 0; i < 127; ++i)
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{
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S3L_Vec4 v;
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int index = i * 3;
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v.x = houseVertices[index];
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v.y = houseVertices[index + 1];
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v.z = houseVertices[index + 2];
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S3L_vec3Xmat4(&v,m);
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S3L_Unit d = S3L_distanceManhattan(v,scene.camera.transform.translation);
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d = radius - d;
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int l = 0;
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if (d >= 0)
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l = 255 - S3L_interpolateFrom0(255,d,radius);
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houseVertexLighting[i] = l;
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}
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}
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void draw()
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{
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S3L_newFrame();
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@ -233,6 +299,9 @@ void draw()
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uint32_t f = frame;
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if (f % 16 == 0)
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recomputeLight();
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//scene.models[0].transform.rotation.z = f * 0.1;
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//scene.models[0].transform.rotation.x = f * 0.3;
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@ -280,7 +349,7 @@ scene.camera.transform.rotation.x = -35;
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scene.camera.transform.rotation.y = 128;
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scene.camera.transform.rotation.z = 0;
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S3L_setTransform3D(-542,-449,4000,39,216,0,512,512,512,&(scene.camera.transform));
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S3L_setTransform3D(3196,1814,5958,-18,300,0,512,512,512,&(scene.camera.transform));
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scene.modelCount = 2;
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scene.models = models;
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@ -296,12 +365,14 @@ S3L_setTransform3D(-542,-449,4000,39,216,0,512,512,512,&(scene.camera.transform)
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// scene.models[1] = scene.models[0];
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// scene.models[1].transform.translation.x = 0.5 * S3L_FRACTIONS_PER_UNIT;
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scene.models[1] = house;
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scene.models[1] = houseModel;
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S3L_initTransoform3D(&(scene.models[1].transform));
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S3L_initDrawConfig(&(scene.models[1].config));
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scene.models[1].transform.translation.y = -1 * S3L_FRACTIONS_PER_UNIT;
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scene.models[1].transform.translation.z = 4 * S3L_FRACTIONS_PER_UNIT;
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recomputeLight();
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// scene.camera.transform.translation.x = S3L_FRACTIONS_PER_UNIT;
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// scene.camera.transform.translation.y = S3L_FRACTIONS_PER_UNIT;
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@ -350,7 +421,7 @@ S3L_setTransform3D(-542,-449,4000,39,216,0,512,512,512,&(scene.camera.transform)
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}
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S3L_Vec4 camF, camR, camU;
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int step = 10;
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int step = 50;
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S3L_rotationToDirections(
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scene.camera.transform.rotation,
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