From 237685dff139d2f99ff276443db05902201544ab Mon Sep 17 00:00:00 2001
From: Derek <derekdinan@users.noreply.github.com>
Date: Sun, 28 Feb 2021 08:39:54 +1000
Subject: [PATCH] Add hold model

---
 src/Model.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/src/Model.c b/src/Model.c
index abb470755..376fcdea6 100644
--- a/src/Model.c
+++ b/src/Model.c
@@ -2112,6 +2112,79 @@ static void SkinnedCubeModel_Register(void) {
 }
 
 
+
+/*########################################################################################################################*
+*---------------------------------------------------------HoldModel-------------------------------------------------------*
+*#########################################################################################################################*/
+static void RecalcProperties(struct Entity* e) {
+	// Calculate block ID based on the X scale of the model
+	// E.g, hold|1.001 = stone (ID = 1), hold|1.041 = gold (ID = 41) etc.
+	BlockID block = (BlockID)((e->ModelScale.X - 0.9999f) * 1000);
+
+	if (block > 0) {
+		// Change the block that the player is holding
+		if (block < BLOCK_COUNT) e->ModelBlock = block;
+		else e->ModelBlock = BLOCK_AIR;
+
+		Vec3_Set(e->ModelScale, 1, 1, 1);
+		Entity_UpdateModelBounds(e); // Adjust size/modelAABB after changing model scale
+	}
+}
+
+static void DrawBlockTransform(struct Entity* e, float dispX, float dispY, float dispZ, float scale) {
+	static Vec3 pos;
+	static struct Matrix m, temp;
+
+	pos = e->Position;
+	pos.Y += e->Anim.BobbingModel;
+
+	Entity_GetTransform(e, pos, e->ModelScale, &m);
+	Matrix_Mul(&m, &m, &Gfx.View);
+	Matrix_Translate(&temp, dispX, dispY, dispZ);
+	Matrix_Mul(&m, &temp, &m);
+	Matrix_Scale(&temp, scale / 1.5f, scale / 1.5f, scale / 1.5f);
+	Matrix_Mul(&m, &temp, &m);
+
+	Model_SetupState(&block_model, e);
+	Gfx_LoadMatrix(MATRIX_VIEW, &m);
+	block_model.Draw(e);
+}
+
+static void HoldModel_Draw(struct Entity* e) {
+	static float handBob;
+	static float handIdle;
+
+	RecalcProperties(e);
+
+	handBob = (float)Math_Sin(e->Anim.WalkTime * 2.0f) * e->Anim.Swing * MATH_PI / 16.0f;
+	handIdle = e->Anim.RightArmX * (1.0f - e->Anim.Swing);
+
+	e->Anim.RightArmX = 0.5f + handBob + handIdle;
+	e->Anim.RightArmZ = 0;
+
+	Model_SetupState(Models.Human, e);
+	HumanModel_Draw(e);
+
+	DrawBlockTransform(e, 0.33F, (MATH_PI / 3 + handBob + handIdle) * 10 / 16 + 0.127f, -7.0f / 16, 0.5f);
+}
+
+static struct Model hold_model;
+
+static float HoldModel_GetEyeY(struct Entity* e) {
+	RecalcProperties(e);
+	return HumanModel_GetEyeY(e);
+}
+
+static void HoldModel_Register(void) {
+	hold_model = human_model;
+	hold_model.name = "hold";
+	hold_model.MakeParts = Model_NoParts;
+	hold_model.Draw = HoldModel_Draw;
+	hold_model.GetEyeY = HoldModel_GetEyeY;
+	Model_Register(&hold_model);
+}
+
+
 /*########################################################################################################################*
 *-------------------------------------------------------Models component--------------------------------------------------*
 *#########################################################################################################################*/
@@ -2146,6 +2219,7 @@ static void RegisterDefaultModels(void) {
 	SittingModel_Register();
 	CorpseModel_Register();
 	SkinnedCubeModel_Register();
+	HoldModel_Register();
 }
 
 static void OnContextLost(void* obj) {