From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 Minecraft.Client/ExperienceOrbRenderer.cpp | 91 ++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 Minecraft.Client/ExperienceOrbRenderer.cpp

(limited to 'Minecraft.Client/ExperienceOrbRenderer.cpp')

diff --git a/Minecraft.Client/ExperienceOrbRenderer.cpp b/Minecraft.Client/ExperienceOrbRenderer.cpp
new file mode 100644
index 00000000..1771f833
--- /dev/null
+++ b/Minecraft.Client/ExperienceOrbRenderer.cpp
@@ -0,0 +1,91 @@
+#include "stdafx.h"
+#include "ExperienceOrbRenderer.h"
+#include "..\Minecraft.World\net.minecraft.world.entity.h"
+#include "..\Minecraft.World\net.minecraft.world.level.tile.h"
+#include "..\Minecraft.World\net.minecraft.world.item.h"
+#include "Tesselator.h"
+#include "EntityRenderDispatcher.h"
+#include "..\Minecraft.World\Mth.h"
+#include "..\Minecraft.World\JavaMath.h"
+
+ExperienceOrbRenderer::ExperienceOrbRenderer()
+{
+	// 4J In class Java initialisors
+	tileRenderer = new TileRenderer();
+	setColor = true;
+
+	this->shadowRadius = 0.15f;
+	this->shadowStrength = 0.75f;
+}
+
+
+void ExperienceOrbRenderer::render(shared_ptr<Entity> _orb, double x, double y, double z, float rot, float a)
+{
+	shared_ptr<ExperienceOrb> orb = dynamic_pointer_cast<ExperienceOrb>(_orb);
+	glPushMatrix();
+	glTranslatef((float) x, (float) y, (float) z);
+
+	int icon = orb->getIcon();
+	bindTexture(TN_ITEM_EXPERIENCE_ORB);	// 4J was L"/item/xporb.png"
+	Tesselator *t = Tesselator::getInstance();
+
+	float u0 = ((icon % 4) * 16 + 0) / 64.0f;
+	float u1 = ((icon % 4) * 16 + 16) / 64.0f;
+	float v0 = ((icon / 4) * 16 + 0) / 64.0f;
+	float v1 = ((icon / 4) * 16 + 16) / 64.0f;
+
+
+	float r = 1.0f;
+	float xo = 0.5f;
+	float yo = 0.25f;
+
+	if (SharedConstants::TEXTURE_LIGHTING)
+	{
+		int col = orb->getLightColor(a);
+		int u = col % 65536;
+		int v = col / 65536;
+		glMultiTexCoord2f(GL_TEXTURE1, u / 1.0f, v / 1.0f);
+		glColor4f(1, 1, 1, 1);
+	}
+	else
+	{
+		float br = orb->getBrightness(a);
+		glColor4f(br, br, br, 1);
+	}
+	float br = 255.0f;
+	float rr = (orb->tickCount + a) / 2;
+	int rc = (int) ((Mth::sin(rr + 0 * PI * 2 / 3) + 1) * 0.5f * br);
+	int gc = (int) (br);
+	int bc = (int) ((Mth::sin(rr + 2 * PI * 2 / 3) + 1) * 0.1f * br);
+	int col = rc << 16 | gc << 8 | bc;
+	glRotatef(180 - entityRenderDispatcher->playerRotY, 0, 1, 0);
+	glRotatef(-entityRenderDispatcher->playerRotX, 1, 0, 0);
+	float s = 0.3f;
+	glScalef(s, s, s);
+	t->begin();
+	t->color(col, 128);
+	t->normal(0, 1, 0);
+	t->vertexUV(0 - xo, 0 - yo, 0, u0, v1);
+	t->vertexUV(r - xo, 0 - yo, 0, u1, v1);
+	t->vertexUV(r - xo, 1 - yo, 0, u1, v0);
+	t->vertexUV(0 - xo, 1 - yo, 0, u0, v0);
+	t->end();
+
+	glDisable(GL_BLEND);
+	glDisable(GL_RESCALE_NORMAL);
+	glPopMatrix();
+}
+
+void ExperienceOrbRenderer::blit(int x, int y, int sx, int sy, int w, int h)
+{
+	float blitOffset = 0;
+	float us = 1 / 256.0f;
+	float vs = 1 / 256.0f;
+	Tesselator *t = Tesselator::getInstance();
+	t->begin();
+	t->vertexUV(x + 0, y + h, blitOffset, (sx + 0) * us, (sy + h) * vs);
+	t->vertexUV(x + w, y + h, blitOffset, (sx + w) * us, (sy + h) * vs);
+	t->vertexUV(x + w, y + 0, blitOffset, (sx + w) * us, (sy + 0) * vs);
+	t->vertexUV(x + 0, y + 0, blitOffset, (sx + 0) * us, (sy + 0) * vs);
+	t->end();
+}
\ No newline at end of file
-- 
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