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small3dlib/programs/test.c
Miloslav Číž 88a2079332 Improve tests
2020-06-17 19:00:06 +02:00

562 lines
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/**
Some basic tests for small3dlib.
author: Miloslav Ciz
license: CC0 1.0
*/
#include <stdio.h>
#include <string.h>
#include <math.h>
#define S3L_PIXEL_FUNCTION pixelFunc
#define S3L_RESOLUTION_X 64
#define S3L_RESOLUTION_Y 40
#define S3L_SORT 1
#include "../small3dlib.h"
#define TEST_BUFFER_W 16
#define TEST_BUFFER_H 16
const char expectedRender[S3L_RESOLUTION_X * S3L_RESOLUTION_Y + 1] =
"...................54433221100.................................."
"...................55443221100.................................."
"...................6554432211..................................."
"...................65544332....................................."
"...................665544......................................."
"..........AAA......7655........................................."
"..........BAAACE...76..........................................."
"..........CABAABDEG..........................................ddd"
".........DBABAAABCDFGH...............................eeeeeeeeddd"
".........DBABBAAABCDEGH.....................fffffffeeeeeeeeeeddd"
".........EDBACBAAABCDEFG............gggggffffffffffeeeeeeeeeeddd"
"........FECBACCBBAAABDEG....hhhggggggggggffffffffffeeeeeeeeeeddd"
"........GFDCBADCBBAihhhhhhhhhhggggggggggffffffffffeeeeeeeeeeeddd"
"........HFECBADCCBBahhhhhhhhhhggggggggggffffffffffeeeeeeeeeeeddd"
".......IGFECBADDCCBaahhhhhhhhhggggggggggffffffffffeeeeeeeeeeeddd"
"........HGEDCBAEDCCaaahhhhhhhhggggggggggfffffffffffeeeeeeeeeeddd"
"........AGFDCBAEDDCaaaahhhhhhhgggggggggggffffffffffeeeeeeeeeeddd"
"........BAFECBAEEDDaaaaahhhhhhhggggggggggffffffffffeeeeeeeeeeddd"
"........BAAFDCBAFEEaaaaaahhhhhhggggggggggffffffffffeeeeeeeeeeddd"
".........BAAECBAFFEbaaaaahhhhhggggggggggffffffffffeeeeeeeeeeeddd"
".........CBAADCBAGFbbaaaaahhhhggggggggggffffffffffeeeeeeeeeeeddd"
".........CCBAACBAGFbbbaaaaahhhggggggggggfffffffffffeeeeeeeeeeddd"
".........DCBBAACAGGbbbbaaaaahhgggggggggggffffffffffeeeeeeeeeeddd"
"..........DCCBAABAHbbbbbaaaaahhggggggggggffffffffffeeeeeeeeeeddd"
"..........DDCBBAAAHbbbbbaaaaaahggggggggggffffffffffeeeeeeeeeeddd"
"..........EDDCBBAAIcbbbbbaaaaaaggggggggggffffffffffeeeeeeeeeeddd"
"..........EEDDCCBAHccbbbbbaaaaagggggggggffffffffffeeeeeeeeeeeddd"
"...........FEDDCBGFcccbbbbbaaaaaggggggggfffffffffffeeeeeeeeeeddd"
"...........FEEDCFEDccccbbbbbaaaaaggggggggffffffffffeeeeeeeeeeddd"
"...........GFEEDEDCcccccbbbbbaaaaagggggggffffffffffeeeeeeeeeeddd"
"...........GFFEDCBAcccccbbbbbaaaaaaggggggffffffffffeeeeeeeeeeddd"
"............GFCBAACdcccccbbbbbaaaaaagggggffffffffffeeeeeeeeeeddd"
"............HGBABAAddcccccbbbbbaaaaaggggffffffffffeeeeeeeeeeeddd"
"............HAAA...dddcccccbbbbbaaaaagggfffffffffffeeeeeeeeeeddd"
"...................ddddcccccbbbbbaaaaagggffffffffffeeeeeeeeeeddd"
"...................dddddcccccbbbbbaaaaaggffffffffffeeeeeeeeeeddd"
"...................dddddcccccbbbbbaaaaaagffffffffffeeeeeeeeeeddd"
"...................edddddcccccbbbbbaaaaaaffffffffffeeeeeeeeeeddd"
"...................eedddddcccccbbbbbaaaaaafffffffffeeeeeeeeeeddd"
"...................eeedddddcccccbbbbbaaaaafffffffffeeeeeeeeeeddd";
uint8_t testRaster[TEST_BUFFER_W * TEST_BUFFER_H];
uint8_t testScreen[S3L_RESOLUTION_X * S3L_RESOLUTION_Y];
uint8_t renderingMode = 0;
void pixelFunc(S3L_PixelInfo *p)
{
if (renderingMode == 0)
testRaster[p->y * TEST_BUFFER_W + p->x] += 1;
else
{
char c = 'x';
switch (p->modelIndex)
{
case 0: c = 'a'; break;
case 1: c = 'A'; break;
case 2: c = '0'; break;
default: break;
}
c += ((p->barycentric[0] * 8) / S3L_FRACTIONS_PER_UNIT);
testScreen[p->y * S3L_RESOLUTION_X + p->x] = c;
}
}
int testTriangleRasterization(
S3L_ScreenCoord x0,
S3L_ScreenCoord y0,
S3L_ScreenCoord x1,
S3L_ScreenCoord y1,
S3L_ScreenCoord x2,
S3L_ScreenCoord y2,
uint8_t *expectedPixels
)
{
printf(" --- testing tringle rasterization [%d,%d] [%d,%d] [%d,%d] (|: expected, -: rasterized) ----\n",x0,y0,x1,y1,x2,y2);
memset(testRaster,0,TEST_BUFFER_W * TEST_BUFFER_H);
S3L_Vec4 p0, p1, p2;
S3L_setVec4(&p0,x0,y0,1000,0);
S3L_setVec4(&p1,x1,y1,1000,0);
S3L_setVec4(&p2,x2,y2,1000,0);
S3L_drawTriangle(p0,p1,p2,0,0);
printf(" 0123456789ABCDEF\n");
uint16_t numErrors = 0;
for (uint8_t y = 0; y < TEST_BUFFER_H; ++y)
{
printf(" %d",y);
if (y < 10)
printf(" ");
for (uint8_t x = 0; x < TEST_BUFFER_W; ++x)
{
uint8_t expected = expectedPixels[y * TEST_BUFFER_W + x];
uint8_t rasterized = testRaster[y * TEST_BUFFER_W + x];
char c =
expected ?
(rasterized ? '+' : '|')
:
(rasterized ? '-' : ' ');
if (c == '-' || c == '|')
numErrors++;
printf("%c",c);
}
printf("\n");
}
printf(" errors: %d\n\n",numErrors);
return numErrors;
}
int testRasterization(void)
{
printf("\n=== TESTING RASTERIZATION ===\n");
uint16_t numErrors = 0;
uint8_t pixelsEmpty[TEST_BUFFER_W * TEST_BUFFER_H];
memset(pixelsEmpty,0,TEST_BUFFER_W * TEST_BUFFER_H);
numErrors += testTriangleRasterization(5,3, 3,3, 9,3, pixelsEmpty);
numErrors += testTriangleRasterization(9,4, 9,0, 9,9, pixelsEmpty);
numErrors += testTriangleRasterization(9,9, 6,6, 3,3, pixelsEmpty);
numErrors += testTriangleRasterization(0,6, 3,3, 6,0, pixelsEmpty);
numErrors += testTriangleRasterization(7,7, 7,7, 7,7, pixelsEmpty);
uint8_t pixels1[TEST_BUFFER_W * TEST_BUFFER_H] =
{
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 1
0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0, // 2
0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0, // 3
0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0, // 4
0,0,1,1,1,1,1,1,0,0,0,0,0,0,0,0, // 5
0,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0, // 6
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 7
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 8
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 9
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // A
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // B
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // C
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // D
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // E
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 // F
};
numErrors += testTriangleRasterization(4,1, 1,6, 9,7, pixels1);
uint8_t pixels2[TEST_BUFFER_W * TEST_BUFFER_H] =
{
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 1
0,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0, // 2
0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0, // 3
0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0, // 4
0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0, // 5
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 6
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 7
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 8
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 9
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // A
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // B
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // C
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // D
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // E
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 // F
};
numErrors += testTriangleRasterization(7,1, 1,2, 4,6, pixels2);
uint8_t pixels3[TEST_BUFFER_W * TEST_BUFFER_H] =
{
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 1
0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0, // 2
0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0, // 3
0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0, // 4
0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0, // 5
0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0, // 6
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 7
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 8
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 9
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // A
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // B
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // C
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // D
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // E
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 // F
};
numErrors += testTriangleRasterization(2,1, 1,3, 6,9, pixels3);
uint8_t pixels4[TEST_BUFFER_W * TEST_BUFFER_H] =
{
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0
0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 1
0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0, // 2
0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0, // 3
0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0, // 4
0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0, // 5
0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0, // 6
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 7
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 8
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 9
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // A
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // B
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // C
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // D
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // E
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 // F
};
numErrors += testTriangleRasterization(4,8, 4,2, 0,0, pixels4);
uint8_t pixels5[TEST_BUFFER_W * TEST_BUFFER_H] =
{
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0
0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0, // 1
0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0, // 2
0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0, // 3
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 4
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 5
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 6
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 7
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 8
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 9
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // A
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // B
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // C
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // D
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // E
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 // F
};
numErrors += testTriangleRasterization(6,2, 2,4, 0,0, pixels5);
uint8_t pixels6[TEST_BUFFER_W * TEST_BUFFER_H] =
{
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0
0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0, // 1
1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0, // 2
0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0, // 3
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 4
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 5
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 6
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 7
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 8
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 9
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // A
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // B
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // C
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // D
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // E
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 // F
};
numErrors += testTriangleRasterization(0,2, 6,0, 4,4, pixels6);
printf("cover test (each pixel should be covered exactly once):\n\n");
S3L_ScreenCoord coords[] =
{
0,0,
6,0,
13,0,
15,0,
14,1,
11,2,
3,3,
11,4,
14,5,
0,6,
6,6,
13,8,
8,9,
3,12,
9,12,
11,13,
9,14,
0,15,
15,15
};
memset(testRaster,0,TEST_BUFFER_W * TEST_BUFFER_H);
#define dt(i1,i2,i3)\
{\
S3L_Vec4 p0, p1, p2;\
S3L_setVec4(&p0,coords[2*i1],coords[2*i1 + 1],1000,0);\
S3L_setVec4(&p1,coords[2*i2],coords[2*i2+1],1000,0);\
S3L_setVec4(&p2,coords[2*i3],coords[2*i3+1],1000,0);\
S3L_drawTriangle(p0,p1,p2,0,0);\
}
dt(0,1,6) // 0
dt(1,2,5) // 1
dt(2,4,5) // 2
dt(2,3,4) // 3
dt(0,6,9) // 4
dt(1,10,6) // 5
dt(1,5,10) // 6
dt(5,4,8) // 7
dt(4,3,8) // 8
dt(9,6,10) // 9
dt(10,5,12) // 10
dt(5,7,12) // 11
dt(5,7,11) // 12
dt(5,8,11) // 13
dt(8,3,18) // 14
dt(9,10,13) // 15
dt(10,12,13) // 16
dt(12,7,11) // 17
dt(11,8,18) // 18
dt(9,13,17) // 19
dt(13,12,14) // 20
dt(12,11,14) // 21
dt(11,14,15) // 22
dt(15,11,18) // 23
dt(13,14,16) // 24
dt(14,15,16) // 25
dt(17,13,16) // 26
dt(16,15,18) // 27
dt(16,17,18) // 28
// extra empty triangles
dt(12,12,12);
dt(9,10,10);
dt(1,10,10);
dt(9,6,1);
dt(0,6,10);
#undef dt
uint16_t numErrors2 = 0;
for (uint8_t y = 0; y < TEST_BUFFER_H - 1; ++y)
{ // ^ complete left and bottom aren't
printf(" "); // supposed to be rasterized
for (uint8_t x = 0; x < TEST_BUFFER_W - 1; ++x)
{
uint8_t count = testRaster[y * TEST_BUFFER_W + x];
printf("%d",count);
if (count != 1)
numErrors2++;
}
printf("\n");
}
printf(" errors: %d\n",numErrors2);
numErrors += numErrors2;
printf("total rasterization errors: %d\n",numErrors);
return numErrors;
}
static inline double absVal(double a)
{
return a >= 0.0 ? a : (-1 * a);
}
double vec3Len(S3L_Vec4 v)
{
return sqrt(
((double) v.x) * ((double) v.x) +
((double) v.y) * ((double) v.y) +
((double) v.z) * ((double) v.z));
}
int testGeneral(void)
{
printf("\n=== TESTING GENERAL ===\n");
printf("testing vector normalization precision...\n");
S3L_Unit m = 100 * S3L_FRACTIONS_PER_UNIT;
S3L_Unit tolerance = 0.1 * S3L_FRACTIONS_PER_UNIT;
uint32_t errors0 = 0;
uint32_t errors1 = 0;
for (S3L_Unit x = -1 * m; x < m; x += 3 * (absVal(x) / 64 + 1))
for (S3L_Unit y = -1 * m; y < m; y += 3 * (absVal(y) / 32 + 1))
for (S3L_Unit z = -1 * m; z < m; z += 5 * (absVal(z) / 64 + 1))
{
S3L_Vec4 v;
S3L_setVec4(&v,x,y,z,0);
S3L_normalizeVec3Fast(&v);
double l0 = vec3Len(v);
double e0 = absVal(l0 - S3L_FRACTIONS_PER_UNIT);
S3L_setVec4(&v,x,y,z,0);
S3L_normalizeVec3(&v);
double l1 = vec3Len(v);
double e1 = absVal(l1 - S3L_FRACTIONS_PER_UNIT);
if (e0 > tolerance)
errors0++;
if (e1 > tolerance)
{
errors1++;
printf("%f\n",l1);
S3L_logVec4(v);
}
}
printf("wrong normalization with unsafe function: %d\nwrong normalizations with safe function: %d\n",errors0,errors1);
return errors1;
}
S3L_Unit cubeVertices[] = { S3L_CUBE_VERTICES(S3L_FRACTIONS_PER_UNIT) };
S3L_Index cubeTriangles[] = { S3L_CUBE_TRIANGLES };
S3L_Unit triangleVertices[] = { -512, 0, 512, 402, 0, 200, 0, 600, 0 };
S3L_Index triangleTriangles[] = { 0, 1, 2 };
S3L_Model3D cubeModel;
S3L_Model3D triangleModel;
S3L_Model3D models[4];
S3L_Scene scene;
int testRender(void)
{
printf("\n=== TESTING RENDER ===\n");
memset(testScreen,'.',S3L_RESOLUTION_X * S3L_RESOLUTION_Y);
S3L_initModel3D(cubeVertices,S3L_CUBE_VERTEX_COUNT,cubeTriangles,S3L_CUBE_TRIANGLE_COUNT,&cubeModel);
S3L_initModel3D(triangleVertices,3,triangleTriangles,1,&triangleModel);
models[0] = cubeModel;
models[0].transform.translation.z -= S3L_FRACTIONS_PER_UNIT;
models[1] = cubeModel;
models[1].transform.translation.x -= S3L_FRACTIONS_PER_UNIT * 2;
models[1].transform.translation.y = S3L_FRACTIONS_PER_UNIT / 2;
models[1].transform.scale.y = S3L_FRACTIONS_PER_UNIT * 2;
models[1].transform.rotation.x = 200;
models[1].transform.rotation.y = 100;
models[2] = triangleModel;
models[2].transform.translation.x = -1000;
models[2].transform.translation.y = 1000;
models[3] = triangleModel;
models[3].transform.translation.x = -1500;
models[3].transform.translation.y = 1200;
models[3].transform.rotation.x = S3L_FRACTIONS_PER_UNIT / 2; // turn away, test BF culling
S3L_initScene(models,4,&scene);
scene.camera.transform.translation.z = -2 * S3L_FRACTIONS_PER_UNIT;
scene.camera.transform.translation.y = S3L_FRACTIONS_PER_UNIT / 3;
scene.camera.transform.rotation.y = 30;
renderingMode = 1;
S3L_newFrame();
S3L_drawScene(scene);
int errors = 0;
for (uint32_t i = 0; i < (S3L_RESOLUTION_X * S3L_RESOLUTION_Y); ++i)
{
if ((i % S3L_RESOLUTION_X) == 0)
printf(" \n");
printf("%c",testScreen[i]);
if (testScreen[i] != expectedRender[i])
errors += 1;
}
return errors;
}
int main(void)
{
printf("testing small3dlib\n\n");
S3L_Mat4 m, m2;
S3L_Vec4 v;
S3L_initMat4(&m);
S3L_logMat4(m);
S3L_initVec4(&v);
S3L_logVec4(v);
S3L_vec4Xmat4(&v,&m);
S3L_logVec4(v);
S3L_makeTranslationMat(100,200,300,&m2);
S3L_logMat4(m2);
S3L_mat4Xmat4(&m,&m2);
S3L_logMat4(m);
uint32_t totalErrors = 0;
totalErrors += testGeneral();
totalErrors += testRasterization();
totalErrors += testRender();
printf("\n\n===== DONE =====\ntotal errors: %d\n",totalErrors);
return 0;
}
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