tests: add some test for project/unproject

test/src/test_project.c

@@ -5,28 +5,22 @@
  * Full license can be found in the LICENSE file
  */
 
-#include "test_common.h"
+/* test inline project */
 
-TEST_IMPL(project) {
-  mat4 model, view, proj, mvp;
-  vec4 viewport = {0.0f, 0.0f, 800.0f, 600.0f};
-  vec3 pos      = {13.0f, 45.0f, 0.74f};
-  vec3 projected, unprojected;
+#define GLM_PREFIX glm_
+#define GLM(X) (glm_ ## X)
 
-  glm_translate_make(model, (vec3){0.0f, 0.0f, -10.0f});
-  glm_lookat((vec3){0.0f, 0.0f, 0.0f}, pos, GLM_YUP, view);
+#include "test_project.h"
 
-  glm_perspective_default(0.5f, proj);
-  glm_mat4_mulN((mat4 *[]){&proj, &view, &model}, 3, mvp);
+#undef GLM
+#undef GLM_PREFIX
 
-  glmc_project(pos, mvp, viewport, projected);
-  glmc_unproject(projected, mvp, viewport, unprojected);
+/* test pre-compiled project */
 
-  /* unprojected of projected vector must be same as original one */
-  /* we used 0.01 because of projection floating point errors */
-  ASSERT(fabsf(pos[0] - unprojected[0]) < 0.01);
-  ASSERT(fabsf(pos[1] - unprojected[1]) < 0.01);
-  ASSERT(fabsf(pos[2] - unprojected[2]) < 0.01);
-  
-  TEST_SUCCESS
-}
+#define GLM_PREFIX glmc_
+#define GLM(X) (glmc_ ## X)
+
+#include "test_project.h"
+
+#undef GLM
+#undef GLM_PREFIX

test/src/test_project.h

@@ -0,0 +1,92 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+#include "test_common.h"
+
+TEST_IMPL(GLM_PREFIX, unprojecti) {
+  mat4 model, view, proj, mvp;
+  vec4 viewport = {0.0f, 0.0f, 800.0f, 600.0f};
+  vec3 pos      = {13.0f, 45.0f, 0.74f};
+  vec3 projected, unprojected;
+
+  glm_translate_make(model, (vec3){0.0f, 0.0f, -10.0f});
+  glm_lookat((vec3){0.0f, 0.0f, 0.0f}, pos, GLM_YUP, view);
+
+  glm_perspective_default(0.5f, proj);
+  glm_mat4_mulN((mat4 *[]){&proj, &view, &model}, 3, mvp);
+
+  GLM(project)(pos, mvp, viewport, projected);
+
+  glm_mat4_inv(mvp, mvp);
+  GLM(unprojecti)(projected, mvp, viewport, unprojected);
+
+  /* unprojected of projected vector must be same as original one */
+  /* we used 0.01 because of projection floating point errors */
+  ASSERT(fabsf(pos[0] - unprojected[0]) < 0.01)
+  ASSERT(fabsf(pos[1] - unprojected[1]) < 0.01)
+  ASSERT(fabsf(pos[2] - unprojected[2]) < 0.01)
+
+  TEST_SUCCESS
+}
+
+TEST_IMPL(GLM_PREFIX, unproject) {
+  mat4 model, view, proj, mvp;
+  vec4 viewport = {0.0f, 0.0f, 800.0f, 600.0f};
+  vec3 pos      = {13.0f, 45.0f, 0.74f};
+  vec3 projected, unprojected;
+
+  glm_translate_make(model, (vec3){0.0f, 0.0f, -10.0f});
+  glm_lookat((vec3){0.0f, 0.0f, 0.0f}, pos, GLM_YUP, view);
+
+  glm_perspective_default(0.5f, proj);
+  glm_mat4_mulN((mat4 *[]){&proj, &view, &model}, 3, mvp);
+
+  GLM(project)(pos, mvp, viewport, projected);
+  GLM(unproject)(projected, mvp, viewport, unprojected);
+
+  /* unprojected of projected vector must be same as original one */
+  /* we used 0.01 because of projection floating point errors */
+  ASSERT(fabsf(pos[0] - unprojected[0]) < 0.01)
+  ASSERT(fabsf(pos[1] - unprojected[1]) < 0.01)
+  ASSERT(fabsf(pos[2] - unprojected[2]) < 0.01)
+
+  TEST_SUCCESS
+}
+
+TEST_IMPL(GLM_PREFIX, project) {
+  mat4 model, view, proj, mvp;
+  vec4 viewport = {0.0f, 0.0f, 800.0f, 600.0f};
+  vec3 pos      = {13.0f, 45.0f, 0.74f};
+  vec3 projected, unprojected;
+
+  glm_translate_make(model, (vec3){0.0f, 0.0f, -10.0f});
+  glm_lookat((vec3){0.0f, 0.0f, 0.0f}, pos, GLM_YUP, view);
+
+  glm_perspective_default(0.5f, proj);
+  glm_mat4_mulN((mat4 *[]){&proj, &view, &model}, 3, mvp);
+
+  GLM(project)(pos, mvp, viewport, projected);
+  GLM(unproject)(projected, mvp, viewport, unprojected);
+
+  /* unprojected of projected vector must be same as original one */
+  /* we used 0.01 because of projection floating point errors */
+  ASSERT(fabsf(pos[0] - unprojected[0]) < 0.01)
+  ASSERT(fabsf(pos[1] - unprojected[1]) < 0.01)
+  ASSERT(fabsf(pos[2] - unprojected[2]) < 0.01)
+
+  /* test with no projection */
+  glm_mat4_identity(mvp);
+
+  GLM(project)(pos, mvp, viewport, projected);
+  GLM(unproject)(projected, mvp, viewport, unprojected);
+
+  ASSERT(glm_eq(pos[0], unprojected[0]))
+  ASSERT(glm_eq(pos[1], unprojected[1]))
+  ASSERT(glm_eq(pos[2], unprojected[2]))
+
+  TEST_SUCCESS
+}

test/tests.h

@@ -112,7 +112,13 @@ TEST_DECLARE(camera_lookat)
 TEST_DECLARE(camera_decomp)
 
 /* project */
-TEST_DECLARE(project)
+TEST_DECLARE(glm_unprojecti)
+TEST_DECLARE(glm_unproject)
+TEST_DECLARE(glm_project)
+
+TEST_DECLARE(glmc_unprojecti)
+TEST_DECLARE(glmc_unproject)
+TEST_DECLARE(glmc_project)
 
 /* utils */
 TEST_DECLARE(clamp)
@@ -347,7 +353,13 @@ TEST_LIST {
   TEST_ENTRY(camera_decomp)
   
   /* project */
-  TEST_ENTRY(project)
+  TEST_ENTRY(glm_unprojecti)
+  TEST_ENTRY(glm_unproject)
+  TEST_ENTRY(glm_project)
+  
+  TEST_ENTRY(glmc_unprojecti)
+  TEST_ENTRY(glmc_unproject)
+  TEST_ENTRY(glmc_project)
   
   /* utils */
   TEST_ENTRY(clamp)