Added animation

CMakeLists.txt

@@ -10,7 +10,9 @@ find_package(OpenGL REQUIRED)
 include_directories("src/")
 include_directories("gl/include")
 add_subdirectory(lib/glm EXCLUDE_FROM_ALL)
+
 add_subdirectory(src)
+add_subdirectory(src/animation)
 
 add_executable(demo main.cpp gl/src/glad.c ${SOURCE})
 target_link_libraries(demo glfw OpenGL::GL)

src/CMakeLists.txt

@@ -47,3 +47,5 @@ set(SOURCE
         ${CMAKE_CURRENT_SOURCE_DIR}/timer.cpp
         PARENT_SCOPE
         )
+
+#add_subdirectory(animation)

src/animation/CMakeLists.txt

@@ -0,0 +1,15 @@
+set(HEADERS
+        ${HEADERS}
+        ${CMAKE_CURRENT_SOURCE_DIR}/float_track.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/integer_track.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/vec3_track.h
+        PARENT_SCOPE
+        )
+
+set(SOURCE
+        ${SOURCE}
+        ${CMAKE_CURRENT_SOURCE_DIR}/float_track.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/integer_track.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/vec3_track.h
+        PARENT_SCOPE
+        )

src/animation/float_track.cpp

@@ -0,0 +1,15 @@
+#include "animation/float_track.h"
+
+BEGIN_NAMESPACE
+
+animated_value float_track::get_value(const animated_value &first, const animated_value &second, float alpha) {
+    animated_value result;
+    result.floatVal = glm::mix(first.floatVal, second.floatVal, alpha);
+    return result;
+};
+
+void float_track::control_object(void *controlled_object, const animated_value &value) {
+    *reinterpret_cast<float *>(controlled_object) = value.floatVal;
+}
+
+END_NAMESPACE

src/animation/float_track.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "animation_track.h"
+
+BEGIN_NAMESPACE
+
+class float_track : public animation_track {
+public:
+    animated_value get_value(const animated_value &first, const animated_value &second, float alpha) override;
+    void control_object(void *controlled_object, const animated_value &value) override;
+};
+
+END_NAMESPACE

src/animation/integer_track.cpp

@@ -0,0 +1,16 @@
+#include "animation/integer_track.h"
+
+BEGIN_NAMESPACE
+
+animated_value integer_track::get_value(const animated_value &first, const animated_value &second, float alpha) {
+    // no interpolation here
+    animated_value result;
+    result.intVal = static_cast<int>(first.intVal + (second.intVal - first.intVal) * alpha);
+    return result;
+};
+
+void integer_track::control_object(void *controlled_object, const animated_value &value) {
+    *reinterpret_cast<int *>(controlled_object) = value.intVal;
+}
+
+END_NAMESPACE

src/animation/integer_track.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "animation_track.h"
+
+BEGIN_NAMESPACE
+
+class integer_track : public animation_track {
+public:
+    animated_value get_value(const animated_value &first, const animated_value &second, float alpha) override;
+    void control_object(void *controlled_object, const animated_value &value) override;
+};
+
+END_NAMESPACE

src/animation/vec3_track.cpp

@@ -0,0 +1,15 @@
+#include "vec3_track.h"
+
+BEGIN_NAMESPACE
+
+animated_value vec3_track::get_value(const animated_value &first, const animated_value &second, float alpha) {
+    animated_value result;
+    result.vec3_val = glm::mix(first.vec3_val, second.vec3_val, alpha);
+    return result;
+};
+
+void vec3_track::control_object(void *controlled_object, const animated_value &value) {
+    *reinterpret_cast<glm::vec3 *>(controlled_object) = value.vec3_val;
+}
+
+END_NAMESPACE

src/animation/vec3_track.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "animation_track.h"
+
+BEGIN_NAMESPACE
+
+class vec3_track : public animation_track {
+public:
+
+    animated_value get_value(const animated_value &first, const animated_value &second, float alpha) override;
+    void control_object(void *controlled_object, const animated_value &value) override;
+};
+
+END_NAMESPACE

src/animation_track.h

@@ -18,11 +18,11 @@ enum class animated_value_type {
 
 // sadly we cannot use union here since we have non-POD types
 struct animated_value {
-    int intVal;
+    int int_val;
-    float floatVal;
+    float float_val;
-    glm::vec3 vec3Val;
+    glm::vec3 vec3_val;
-    glm::vec4 vec4Val;
+    glm::vec4 vec4_val;
-    glm::quat quatVal;
+    glm::quat quat_val;
 };
 
 struct animation_key {
@@ -32,14 +32,14 @@ struct animation_key {
     static animation_key *vec3Key(float t, glm::vec3 val) {
         auto *result = new animation_key();
         result->time = t;
-        result->value.vec3Val = val;
+        result->value.vec3_val = val;
         return result;
     }
 
     static animation_key *floatKey(float t, float val) {
         auto *result = new animation_key();
         result->time = t;
-        result->value.floatVal = val;
+        result->value.float_val = val;
         return result;
     }
 };