testing curve

.idea/editor.xml

@@ -523,5 +523,8 @@
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=StringLiteralTypo/@EntryIndexRemoved" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=CommentTypo/@EntryIndexRemoved" />
     <option name="/Default/CodeInspection/Highlighting/InspectionSeverities/=IdentifierTypo/@EntryIndexRemoved" />
+    <option name="/Default/CodeStyle/Generate/=CppDefinitions/@KeyIndexDefined" value="true" type="bool" />
+    <option name="/Default/CodeStyle/Generate/=CppDefinitions/Options/=GenerateInlineDefinitions/@EntryIndexedValue" value="False" type="string" />
+    <option name="/Default/CodeStyle/Generate/=CppDefinitions/Options/=GenerateInlineDefinitions/@EntryIndexRemoved" />
   </component>
 </project>

CMakeLists.txt

@@ -51,7 +51,7 @@ macro(blt_add_project name source type)
     project(tower-defense)
 endmacro()
 
-project(tower-defense VERSION 0.0.15)
+project(tower-defense VERSION 0.0.16)
 
 option(ENABLE_ADDRSAN "Enable the address sanitizer" OFF)
 option(ENABLE_UBSAN "Enable the ub sanitizer" OFF)

include/map.h

@@ -29,9 +29,11 @@ namespace td
 	class curve_t
 	{
 	public:
-		blt::vec2 get_point(float t) const;
+		curve_t(blt::vec2 p0, blt::vec2 p1, blt::vec2 p2);
+
+		[[nodiscard]] blt::vec2 get_point(float t) const;
 	private:
-		blt::vec2 p0, p1, p2;
+		blt::vec2 m_p0, m_p1, m_p2;
 	};
 
 	class path_segment_t

src/main.cpp

@@ -3,12 +3,18 @@
 #include "blt/gfx/renderer/batch_2d_renderer.h"
 #include "blt/gfx/renderer/camera.h"
 #include "blt/gfx/renderer/resource_manager.h"
+#include <map.h>
 
 blt::gfx::matrix_state_manager global_matrices;
 blt::gfx::resource_manager resources;
 blt::gfx::batch_renderer_2d renderer_2d(resources, global_matrices);
 blt::gfx::first_person_camera camera;
 
+float t = 0;
+float dir = 1;
+
+td::curve_t curve{blt::vec2{250, 250}, blt::vec2{500, 500}, blt::vec2{750, 250}};
+
 void init(const blt::gfx::window_data&)
 {
     using namespace blt::gfx;
@@ -32,6 +38,20 @@ void update(const blt::gfx::window_data& data)
     camera.update_view(global_matrices);
     global_matrices.update();
 
+    t += 0.01f * dir;
+    if (t >= 1)
+    {
+        t = 1;
+        dir = -1;
+    } else if (t <= 0)
+    {
+        t = 0;
+        dir = 1;
+    }
+
+    auto pos = curve.get_point(t);
+    renderer_2d.drawRectangleInternal(blt::make_color(1, 0, 0), blt::gfx::rectangle2d_t{pos, blt::vec2{25, 25}});
+
     renderer_2d.render(data.width, data.height);
 }
 

src/map.cpp

@@ -19,11 +19,14 @@
 
 namespace td
 {
+	curve_t::curve_t(const blt::vec2 p0, const blt::vec2 p1, const blt::vec2 p2): m_p0(p0), m_p1(p1), m_p2(p2)
+	{}
+
 	blt::vec2 curve_t::get_point(const float t) const
 	{
 		const auto t_inv = 1.0f - t;
 		const auto t_inv_sq = t_inv * t_inv;
 		const auto t_sq = t * t;
-		return t_inv_sq * p0 + 2.0f * t_inv * t * p1 + t_sq * p2;
+		return t_inv_sq * m_p0 + 2.0f * t_inv * t * m_p1 + t_sq * m_p2;
 	}
 }