Optimise selection box rendering.

ClassicalSharp/Selections/SelectionBox.cs

@@ -9,21 +9,21 @@ namespace ClassicalSharp.Selections {
 	internal class SelectionBox {
 		
 		public byte ID;
-		public Vector3I Min, Max;
+		public Vector3 Min, Max;
 		public FastColour Colour;
 		public float MinDist, MaxDist;
 		
 		public SelectionBox(Vector3I p1, Vector3I p2, FastColour col) {	
-			Min = Vector3I.Min(p1, p2);
-			Max = Vector3I.Max(p1, p2);
+			Min = (Vector3)Vector3I.Min(p1, p2);
+			Max = (Vector3)Vector3I.Max(p1, p2);
 			Colour = col;
 		}
 		
 		public void Render(double delta, VertexP3fC4b[] vertices, VertexP3fC4b[] lineVertices,
 		                  ref int index, ref int lineIndex) {
 			float offset = MinDist < 32 * 32 ? 1/32f : 1/16f;
-			Vector3 p1 = (Vector3)Min - new Vector3(offset, offset, offset);
-			Vector3 p2 = (Vector3)Max + new Vector3(offset, offset, offset);
+			Vector3 offsetV = new Vector3(offset, offset, offset);
+			Vector3 p1 = Min - offsetV, p2 = Max + offsetV;
 			int col = Colour.Pack();
 			
 			HorQuad(vertices, ref index, col, p1.X, p1.Z, p2.X, p2.Z, p1.Y); // bottom
@@ -80,14 +80,21 @@ namespace ClassicalSharp.Selections {
 	internal class SelectionBoxComparer : IComparer<SelectionBox> {
 		
 		public int Compare(SelectionBox a, SelectionBox b) {
-			// Reversed comparison order because we need to render back to front for alpha blending.
-			return a.MinDist == b.MinDist 
-				? b.MaxDist.CompareTo(a.MaxDist)
-				: b.MinDist.CompareTo(a.MinDist);
+			float aDist, bDist;
+			if (a.MinDist == b.MinDist) {
+				aDist = a.MaxDist; bDist = b.MaxDist;
+			} else {
+				aDist = a.MinDist; bDist = b.MinDist;
+			}
+
+			// Reversed comparison order result, because we need to render back to front for alpha blending
+			if (aDist < bDist) return 1;
+			if (aDist > bDist) return -1;
+			return 0;
 		}
 		
 		internal void Intersect(SelectionBox box, Vector3 origin) {
-			Vector3I min = box.Min, max = box.Max;
+			Vector3 min = box.Min, max = box.Max;
 			float closest = float.PositiveInfinity, furthest = float.NegativeInfinity;
 			// Bottom corners
 			UpdateDist(origin, min.X, min.Y, min.Z, ref closest, ref furthest);

ClassicalSharp/Selections/SelectionManager.cs

@@ -67,12 +67,12 @@ namespace ClassicalSharp.Selections {
 			IGraphicsApi gfx = game.Graphics;
 			gfx.SetBatchFormat(VertexFormat.P3fC4b);
 			gfx.UpdateDynamicVb_Lines(lineVb, lineVertices,
-			                    selections.Count * LineVerticesCount);
+			                          selections.Count * LineVerticesCount);
 			
 			gfx.DepthWrite = false;
 			gfx.AlphaBlending = true;
 			gfx.UpdateDynamicVb_IndexedTris(vb, vertices,
-			                           selections.Count * VerticesCount);
+			                                selections.Count * VerticesCount);
 			gfx.DepthWrite = true;
 			gfx.AlphaBlending = false;
 		}

src/Client/GameMode.c

@@ -5,6 +5,7 @@
 #include "Screens.h"
 #include "Block.h"
 #include "Event.h"
+#include "HeldBlockRenderer.h"
 
 void GameMode_Init(void) {
 	BlockID* inv = Inventory_Table;
@@ -39,7 +40,7 @@ bool GameMode_HandlesKeyDown(Key key) {
 
 bool GameMode_PickingLeft(void) {
 	/* always play delete animations, even if we aren't picking a block */
-	game.HeldBlockRenderer.ClickAnim(true);
+	HeldBlockRenderer_ClickAnim(true);
 	return false;
 }
 bool GameMode_PickingRight(void) { return false; }

src/Client/Screens.c

@@ -1048,7 +1048,7 @@ void HUDScreen_Render(GuiElement* elem, Real64 delta) {
 
 	if (!screen->ShowingList && !showMinimal) {
 		Gfx_SetTexturing(true);
-		DrawCrosshairs();
+		HUDScreen_DrawCrosshairs();
 		Gfx_SetTexturing(false);
 	}
 	if (chat->HandlesAllInput && !Game_PureClassic) {

src/Client/SelectionBox.c

@@ -7,20 +7,17 @@
 
 /* Data for a selection box. */
 typedef struct SelectionBox_ {
-	Vector3I Min, Max;
+	Vector3 Min, Max;
 	PackedCol Col;
 	Real32 MinDist, MaxDist;
 } SelectionBox;
 
 void SelectionBox_Render(SelectionBox* box, VertexP3fC4b** vertices, VertexP3fC4b** lineVertices) {
 	Real32 offset = box->MinDist < 32.0f * 32.0f ? (1.0f / 32.0f) : (1.0f / 16.0f);
-	Vector3 p1, p2;
-	PackedCol col = box->Col;
-
-	Vector3I_ToVector3(&p1, &box->Min);
-	Vector3I_ToVector3(&p2, &box->Max);
+	Vector3 p1 = box->Min, p2 = box->Max;
 	Vector3_Add1(&p1, &p1, -offset);
 	Vector3_Add1(&p2, &p2,  offset);
+	PackedCol col = box->Col;
 
 	SelectionBox_HorQuad(vertices, col, p1.X, p1.Z, p2.X, p2.Z, p1.Y);       /* bottom */
 	SelectionBox_HorQuad(vertices, col, p1.X, p1.Z, p2.X, p2.Z, p2.Y);       /* top */
@@ -105,7 +102,7 @@ void SelectionBox_UpdateDist(Vector3 p, Real32 x2, Real32 y2, Real32 z2, Real32*
 }
 
 void SelectionBox_Intersect(SelectionBox* box, Vector3 origin) {
-	Vector3I min = box->Min, max = box->Max;
+	Vector3 min = box->Min, max = box->Max;
 	Real32 closest = MATH_POS_INF, furthest = -MATH_POS_INF;
 	/* Bottom corners */
 	SelectionBox_UpdateDist(origin, min.X, min.Y, min.Z, &closest, &furthest);
@@ -133,8 +130,9 @@ bool selections_allocated;
 
 void Selections_Add(UInt8 id, Vector3I p1, Vector3I p2, PackedCol col) {	
 	SelectionBox sel;
-	Vector3I_Min(&sel.Min, &p1, &p2);
-	Vector3I_Max(&sel.Max, &p1, &p2);
+	Vector3I min, max;
+	Vector3I_Min(&min, &p1, &p2); Vector3I_ToVector3(&sel.Min, &min);
+	Vector3I_Max(&max, &p1, &p2); Vector3I_ToVector3(&sel.Max, &max);
 	sel.Col = col;
 
 	Selections_Remove(id);
@@ -158,12 +156,12 @@ void Selections_Remove(UInt8 id) {
 	}
 }
 
-void Selections_ContextLost(void) {
+void Selections_ContextLost(void* obj) {
 	Gfx_DeleteVb(&selections_VB);
 	Gfx_DeleteVb(&selections_LineVB);
 }
 
-void Selections_ContextRecreated(void) {
+void Selections_ContextRecreated(void* obj) {
 	if (!selections_allocated) return;
 	selections_VB     = Gfx_CreateDynamicVb(VERTEX_FORMAT_P3FC4B, SELECTIONS_MAX_VERTICES);
 	selections_LineVB = Gfx_CreateDynamicVb(VERTEX_FORMAT_P3FC4B, SELECTIONS_MAX_VERTICES);
@@ -199,7 +197,7 @@ void Selections_Render(Real64 delta) {
 	Selections_QuickSort(0, selections_count - 1);
 
 	if (!selections_allocated) { /* lazy init as most servers don't use this */
-		Selections_ContextRecreated();
+		Selections_ContextRecreated(NULL);
 		selections_allocated = true;
 	}
 
@@ -231,7 +229,7 @@ void Selections_Reset(void) {
 }
 
 void Selections_Free(void) {
-	Selections_ContextLost();
+	Selections_ContextLost(NULL);
 	Event_UnregisterVoid(&GfxEvents_ContextLost,      NULL, Selections_ContextLost);
 	Event_UnregisterVoid(&GfxEvents_ContextRecreated, NULL, Selections_ContextRecreated);
 }