feat: circular orbit

src/icosphere.cpp

@@ -7,9 +7,9 @@
 
 #include "gfx.hpp"
 
-Icosphere::Icosphere(float radius, int subdivisions, GLuint shaderProgram, glm::vec3 position) :
+Icosphere::Icosphere(float radius, int subdivisions, GLuint shaderProgram) :
     _shaderProgram(shaderProgram),
-    _position(position)
+    _position({})
 {
     generateVertices(radius, subdivisions);
 
@@ -157,6 +157,11 @@ void Icosphere::render()
 	glDrawElements(GL_TRIANGLES, _indices.size(), GL_UNSIGNED_INT, 0);
 }
 
+void Icosphere::setPosition(glm::vec3 position)
+{
+    _position = position;
+}
+
 Icosphere::~Icosphere()
 {
     glDeleteVertexArrays(1, &_vao);

src/icosphere.hpp

@@ -10,9 +10,11 @@
 class Icosphere
 {
 public:
-    Icosphere(float radius, int subdivisions, GLuint shaderProgram, glm::vec3 position);
+    Icosphere(float radius, int subdivisions, GLuint shaderProgram);
 	void render();
 
+    void setPosition(glm::vec3 position);
+
 	~Icosphere();
 
 private:

src/main.cpp

@@ -51,8 +51,8 @@ int main()
     GLuint litProgram = compileShaderProgram("./frag_lit.glsl");
     GLuint unlitProgram = compileShaderProgram("./frag_unlit.glsl");
 
-    Icosphere planet(0.4, 2, litProgram, glm::vec3(0.0, 0.0, 0.0));
-    Icosphere orbiter(0.1, 2, litProgram, glm::vec3(0.6, 0.0, 0.0));
+    Icosphere planet(0.4, 2, litProgram);
+    Icosphere orbiter(0.1, 2, litProgram);
     Orbit orbit(100);
 
     // Main loop
@@ -62,6 +62,12 @@ int main()
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         float time = glfwGetTime();
+        float r = .7;
+        float x = cos(time);
+        float y = sin(time);
+        glm::vec3 pos(x, 0, y);
+        pos *= r;
+        orbiter.setPosition(pos);
 
         // Render lit objects
         glUseProgram(litProgram);