test: add all bezier2 tests

CMakeLists.txt

@@ -9,6 +9,7 @@ option(HMAH_BEZIER_INCLUDE_BEZIER2 "Include Bezier2 class in lib" ON)
 option(HMAH_BEZIER_INCLUDE_BEZIER3 "Include Bezier3 class in lib" ON)
 option(HMAH_BEZIER_STATIC "Build static library" ON)
 option(HMAH_BEZIER_SHARED "Build shared library" OFF)
+option(HMAH_BEZIER_BUILD_TESTS "Build tests for lib testing" ON)
 
 set(FORCE_INCLUDE_ALL ON)
 
@@ -26,4 +27,8 @@ elseif (${HMAH_BEZIER_SHARED})
   add_library(hmahbezier SHARED ${SOURCES})
 else ()
   message(FATAL_ERROR "Choose HMAH_BEZIER_STATIC or HMAH_BEZIER_SHARED to build!")
+endif ()
+
+if (${HMAH_BEZIER_BUILD_TESTS})
+  add_subdirectory(tests)
 endif ()

tests/CMakeLists.txt

@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.14)
+project(HmahBezierLibTests)
+
+unset(CMAKE_CXX_COMPILER)
+
+function(add_test TEST_NAME)
+  add_executable(${TEST_NAME} "${TEST_NAME}.c")
+  target_include_directories(${TEST_NAME} PRIVATE ../src)
+  target_link_libraries(${TEST_NAME} PRIVATE hmahbezier)
+endfunction()
+
+add_test(linear_test)
+add_test(quadratic_test)
+add_test(cubic_test)

tests/cubic_test.c

@@ -0,0 +1,21 @@
+#include "bezier2.h"
+#include "test_plot.h"
+
+#include <stdio.h>
+
+#define PCOUNT 10
+
+int main() {
+  printf("Cubic bezier test with %d points\n", PCOUNT);
+
+  const Bezier2f curve = Bezier2f_CreateCubic(0, 0, 20, 20, 20, 0, 40, 0);
+  const float dt = 1.0f / (float)PCOUNT;
+
+  Point2f points[PCOUNT];
+
+  float t = 0.0f;
+  for (int i = 0; i < PCOUNT; i++, t += dt)
+    points[i] = Bezier2f_Get(&curve, t);
+
+  plot2Df((const float*)points, PCOUNT);
+}

tests/linear_test.c

@@ -0,0 +1,21 @@
+#include "bezier2.h"
+#include "test_plot.h"
+
+#include <stdio.h>
+
+#define PCOUNT 10
+
+int main() {
+  printf("Linear bezier test with %d points\n", PCOUNT);
+
+  const Bezier2f curve = Bezier2f_CreateLinear(0, 0, 20, 20);
+  const float dt = 1.0f / (float)PCOUNT;
+
+  Point2f points[PCOUNT];
+
+  float t = 0.0f;
+  for (int i = 0; i < PCOUNT; i++, t += dt)
+    points[i] = Bezier2f_Get(&curve, t);
+
+  plot2Df((const float*)points, PCOUNT);
+}

tests/quadratic_test.c

@@ -0,0 +1,21 @@
+#include "bezier2.h"
+#include "test_plot.h"
+
+#include <stdio.h>
+
+#define PCOUNT 10
+
+int main() {
+  printf("Quadratic bezier test with %d points\n", PCOUNT);
+
+  const Bezier2f curve = Bezier2f_CreateQuadratic(0, 0, 20, 20, 40, 0);
+  const float dt = 1.0f / (float)PCOUNT;
+
+  Point2f points[PCOUNT];
+
+  float t = 0.0f;
+  for (int i = 0; i < PCOUNT; i++, t += dt)
+    points[i] = Bezier2f_Get(&curve, t);
+
+  plot2Df((const float*)points, PCOUNT);
+}

tests/test_plot.h

@@ -0,0 +1,38 @@
+#ifndef __HMAH_BEZIER_TEST_PLOT_H__
+#define __HMAH_BEZIER_TEST_PLOT_H__
+
+#include <stdio.h>
+#include <stddef.h>
+
+#define PLOT_FILL '#'
+#define PLOT_SPACE '.'
+#define PLOT_WIDTH 40
+#define PLOT_HEIGHT 20
+
+float absf(const float v) {
+  return v < 0.0f ? -v : v;
+}
+
+void plot2Df(const float* points, const size_t pointsCount) {
+  char canvas[PLOT_HEIGHT][PLOT_WIDTH];
+  for (int y = 0; y < PLOT_HEIGHT; y++)
+    for (int x = 0; x < PLOT_WIDTH; x++)
+      canvas[y][x] = PLOT_SPACE;
+
+  for (size_t i = 0; i < pointsCount; i++) {
+    const int x = (int)points[i * 2 + 0];
+    const int y = (int)points[i * 2 + 1];
+    if (x < 0 || x >= PLOT_WIDTH || y < 0 || y >= PLOT_HEIGHT) continue;
+    canvas[y][x] = PLOT_FILL;
+  }
+
+  printf("Plot %dx%d\n", PLOT_WIDTH, PLOT_HEIGHT);
+  for (int y = 0; y < PLOT_HEIGHT; y++) {
+    for (int x = 0; x < PLOT_WIDTH; x++) {
+      putchar(canvas[y][x]);
+    }
+    putchar('\n');
+  }
+}
+
+#endif // __HMAH_BEZIER_TEST_PLOT_H__