WIP: Getting some of the math sorted out and setting up tick_frametime

code2/sectr/space.odin

@@ -0,0 +1,57 @@
+package sectr
+
+/* Space
+Provides various definitions for converting from one standard of measurement to another.
+Provides constructs and transformations in reguards to space.
+
+Ultimately the user's window ppcm (pixels-per-centimeter) determins how all virtual metric conventions are handled.
+*/
+
+// The points to pixels and pixels to points are our only reference to accurately converting
+// an object from world space to screen-space.
+// This prototype engine will have all its spacial unit base for distances in virtual pixels.
+
+Inches_To_CM  :: cast(f32) 2.54
+Points_Per_CM :: cast(f32) 28.3465
+CM_Per_Point  :: cast(f32) 1.0 / DPT_DPCM
+CM_Per_Pixel  :: cast(f32) 1.0 / DPT_PPCM
+DPT_DPCM      :: cast(f32) 72.0 * Inches_To_CM // 182.88 points/dots per cm
+DPT_PPCM      :: cast(f32) 96.0 * Inches_To_CM // 243.84 pixels per cm
+
+when ODIN_OS == .Windows {
+	op_default_dpcm :: 72.0 * Inches_To_CM
+	os_default_ppcm :: 96.0 * Inches_To_CM
+	// 1 inch = 2.54 cm, 96 inch * 2.54 = 243.84 DPCM
+}
+
+AreaSize :: V2_F4
+
+Bounds2 :: struct {
+	top_left, bottom_right: V2_F4,
+}
+
+BoundsCorners2 :: struct {
+	top_left, top_right, bottom_left, bottom_right: V2_F4,
+}
+
+E2_F4 :: V2_F4
+E2_S4 :: V2_F4
+
+WS_Pos :: struct {
+	tile_id : V2_S4,
+	rel     : V2_F4,
+}
+
+Camera :: struct {
+	view     : E2_F4,
+	position : V2_F4,
+	zoom     : f32,
+}
+
+Camera_Default := Camera { zoom = 1 }
+
+CameraZoomMode :: enum u32 {
+	Digital,
+	Smooth,
+}
+