playing more with camera.

data/shader/gameobjects.frag

@@ -19,7 +19,7 @@ void main()
   vec3 Eye       = normalize(-vertex);
   vec3 Reflected = normalize(reflect( -lightPosition, normal));
 
-  vec3 IAmbient  = vec3(0.05f);
+  vec3 IAmbient  = vec3(0.2f);
 
   if (materialKind == 6) {
       // sun: shines by itself

game/renderer_polygon_3d/camera.hpp

@@ -13,7 +13,10 @@ namespace endofthejedi {
 
     class Camera {
         public:
-            Camera() : m_aspectRatio(1.0), m_zoom(1.0), m_position(0.0, 0.0, 0.0), m_angles(0.0, 0.0, 0.0), m_dirty(true)
+            Camera()
+                : m_aspectRatio(1.0), m_fov(util::deg2rad(90.0))
+                , m_zoom(1.0), m_position(0.0, 0.0, 0.0), m_angles(0.0, 0.0, 0.0)
+                , m_dirty(true)
             {
             }
 
@@ -22,7 +25,7 @@ namespace endofthejedi {
         // << 1 scales down
         // 1 is neutral
         // >> 1 makes things bigger
-        void setCameraZoom(float zoom)
+        void setZoom(float zoom)
         {
             if (zoom != m_zoom) {
                 m_zoom = zoom;
@@ -30,8 +33,18 @@ namespace endofthejedi {
             }
         }
 
+        // set field of view.
+        // degree or radian? find it out.
+        void setFov(float fov)
+        {
+            if (fov != m_fov) {
+                m_fov = fov;
+                m_dirty = true;
+            }
+        }
+
         // position of the camera in world space
-        void setCameraPosition(const glm::vec3 &pos)
+        void setPosition(const glm::vec3 &pos)
         {
             if (pos != m_position) {
                 m_position = pos;
@@ -40,7 +53,7 @@ namespace endofthejedi {
         }
 
         // some angles (in rad) for the camera.
-        void setCameraAngles(const glm::vec3 &angles)
+        void setAngles(const glm::vec3 &angles)
         {
             if (angles != m_angles) {
                 m_angles = angles;
@@ -49,17 +62,17 @@ namespace endofthejedi {
         }
 
         // all three arguments.
-        void setCameraPositionAnglesZoom(const glm::vec3 &position, const glm::vec3 &angles, float zoom)
+        void setPositionAnglesZoom(const glm::vec3 &position, const glm::vec3 &angles, float zoom)
         {
-            setCameraZoom(zoom);
-            setCameraPosition(position);
-            setCameraAngles(angles);
+            setZoom(zoom);
+            setPosition(position);
+            setAngles(angles);
         }
 
+        float fov()                 const { return m_fov;         }
         float zoom()                const { return m_zoom;        }
         const glm::vec3 &position() const { return m_position;    }
         const glm::vec3 &angles()   const { return m_angles;      }
-
         float aspectRatio()         const { return m_aspectRatio; }
 
         void setAspectRatio(float r)
@@ -92,14 +105,33 @@ namespace endofthejedi {
 
             //float a = 2.0*M_PI*m_lastTime/10.0;
             //float s = glm::mod(m_lastTime, 5.0f)/1.0f;
+            view = glm::scale(view, glm::vec3(m_zoom, m_zoom, m_zoom));
             view = glm::translate(view, m_position);
-            view = glm::scale(view, glm::vec3(m_zoom/m_aspectRatio, m_zoom, m_zoom));
+            view = glm::rotate(view, m_angles.x, glm::vec3(1.0f, 0.0f, 0.0f));
+            view = glm::rotate(view, m_angles.y, glm::vec3(0.0f, 1.0f, 0.0f));
+            view = glm::rotate(view, m_angles.z, glm::vec3(0.0f, 0.0f, 1.0f));
 
-            m_viewMatrix = view;
+            // Generates a really hard-to-read matrix, but a normal, standard 4x4 matrix nonetheless
+            glm::mat4 projectionMatrix = glm::perspective(
+                    // The horizontal Field of View, in degrees : the amount of
+                    // "zoom". Think "camera lens". Usually between 90° (extra
+                    // wide) and 30° (quite zoomed in)
+                    m_fov,
+
+                    m_aspectRatio,  // aspect ratio
+                    0.1f,           // near clipping plane
+                    100.0f          // far clipping plane
+                    );
+
+
+
+            //m_viewMatrix = view;
+            m_viewMatrix = projectionMatrix * view;
         }
 
     private:
         float     m_aspectRatio;
+        float     m_fov;
         float     m_zoom;
         glm::vec3 m_position;
         glm::vec3 m_angles;

game/renderer_polygon_3d/renderer_polygon_3d.cpp

@@ -142,7 +142,19 @@ namespace endofthejedi {
         //std::cout<<"setting aspect ratio: " << m_aspectRatio << std::endl;
         glUniform1f(m_shader_game_objects.location("aspectRatio"), m_aspectRatio);
 
+        // test code to move the camera
+        float t = 2.0*M_PI*m_lastTime/10.0;
+        float r = 0.5;
+        glm::vec3 pos = glm::vec3(r*sin(t), r*cos(t), 0.0f);
+        m_camera.setPosition(pos);
+
+        // test code to rotate the camera
+        float a = t;
+        m_camera.setAngles(glm::vec3(0.0f, a, 0.0f));
+
+        // must be done once each frame
         m_camera.refresh();
+
         auto *ptr = glm::value_ptr(m_camera.viewMatrix());
 
         glUniformMatrix4fv(m_shader_game_objects.location("view"), 1, GL_FALSE, ptr);