cleaned more stuff

src/display/camera.c

@@ -6,6 +6,78 @@
  */
 
 #include "camera.h"
+#include "display/display.h"
+#include "assert/assert.h"
 
 camera_t CAMERA_DATA[ECS_ENTITY_COUNT_MAX] = { 0 };
-ecscomponent_t CAMERA_COMPONENT = ecsComponentInit(CAMERA_DATA, NULL);
+ecscomponent_t CAMERA_COMPONENT = ecsComponentInit(
+  CAMERA_DATA,
+  ((ecscomponentcallbacks_t){
+    .init = NULL,
+    .entityAdd = cameraEntityAdded
+  })
+);
+
+ecsid_t CAMERA_MAIN = -1;
+
+void cameraEntityAdded(const ecsid_t id) {
+  if(CAMERA_MAIN == -1) CAMERA_MAIN = id;
+
+  camera_t *cam = cameraGet(id);
+  cam->type = CAMERA_TYPE_ORTHOGRAPHIC;
+  cam->perspective.fov = glm_rad(75.0f);
+  cam->nearClip = 0.1f;
+  cam->farClip = 1000.0f;
+  cam->clearColor = COLOR_CORNFLOWER_BLUE;
+}
+
+void cameraPush(const ecsid_t id) {
+  assertTrue(cameraHas(id), "Not a camera component");
+
+  camera_t *cam = cameraGet(id);
+
+  mat4 projection;
+  switch(cam->type) {
+    case CAMERA_TYPE_ORTHOGRAPHIC:
+      glm_ortho(
+        cam->orthographic.left,
+        cam->orthographic.right,
+        cam->orthographic.bottom,
+        cam->orthographic.top,
+        cam->nearClip,
+        cam->farClip,
+        projection
+      );
+      break;
+
+    case CAMERA_TYPE_PERSPECTIVE:
+      glm_perspective(
+        cam->perspective.fov,
+        4.0f / 3.0f,
+        cam->nearClip,
+        cam->farClip,
+        projection
+      );
+  }
+
+  #if DUSK_DISPLAY_SDL2
+    glPushMatrix();
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glLoadMatrixf((const GLfloat*)projection);
+
+    glClearColor(
+      cam->clearColor.r / 255.0f,
+      cam->clearColor.g / 255.0f,
+      cam->clearColor.b / 255.0f,
+      cam->clearColor.a / 255.0f
+    );
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+  #endif
+}
+
+void cameraPop(void) {
+  #if DUSK_DISPLAY_SDL2
+    glPopMatrix();
+  #endif
+}