Added jumping and sneaking when previewing a skin

src/hdskins/java/com/voxelmodpack/hdskins/gui/DummyWorld.java

@@ -1,5 +1,7 @@
 package com.voxelmodpack.hdskins.gui;
 
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.init.Blocks;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.GameType;
 import net.minecraft.world.World;
@@ -27,6 +29,11 @@ public class DummyWorld extends World {
 		return true;
 	}
 
+	@Override
+	public IBlockState getBlockState(BlockPos pos) {
+	    return Blocks.AIR.getDefaultState();
+	}
+
 	@Override
 	public float getLightBrightness(BlockPos pos) {
 		return 1;

src/hdskins/java/com/voxelmodpack/hdskins/gui/EntityPlayerModel.java

@@ -110,6 +110,28 @@ public class EntityPlayerModel extends EntityLivingBase implements IBlankSkinSup
         }
 
         swingProgress = swingProgressInt / 8F;
+
+        motionY *= 0.98;
+        if (Math.abs(motionY) < 0.003) {
+            motionY = 0;
+        }
+
+        if (posY == 0 && isJumping) {
+            jump();
+        }
+
+
+        motionY -= 0.08D;
+        motionY *= 0.9800000190734863D;
+
+        posY += motionY;
+
+        if (posY < 0) {
+            posY = 0;
+        }
+        onGround = posY == 0;
+
+        ticksExisted++;
     }
 
     @Override

src/hdskins/java/com/voxelmodpack/hdskins/gui/GuiSkins.java

@@ -11,7 +11,6 @@ import com.minelittlepony.gui.Button;
 import com.minelittlepony.gui.GameGui;
 import com.minelittlepony.gui.IconicButton;
 import com.minelittlepony.gui.Label;
-import com.minelittlepony.util.math.MathUtil;
 import com.mojang.authlib.GameProfile;
 import com.mojang.authlib.minecraft.MinecraftProfileTexture;
 import com.mojang.authlib.minecraft.MinecraftProfileTexture.Type;
@@ -394,6 +393,17 @@ public class GuiSkins extends GameGui {
 
     @Override
     protected void drawContents(int mouseX, int mouseY, float partialTick) {
+
+
+        boolean sneak = Keyboard.isKeyDown(Keyboard.KEY_LSHIFT) || Keyboard.isKeyDown(Keyboard.KEY_RSHIFT);
+
+        localPlayer.setSneaking(sneak);
+        remotePlayer.setSneaking(sneak);
+
+        boolean jump = Keyboard.isKeyDown(Keyboard.KEY_SPACE);
+        localPlayer.setJumping(jump);
+        remotePlayer.setJumping(jump);
+
         float deltaTime = panorama.getDelta(partialTick);
         panorama.render(partialTick, zLevel);
 

src/hdskins/java/com/voxelmodpack/hdskins/gui/RenderPlayerModel.java

@@ -108,7 +108,7 @@ public class RenderPlayerModel<M extends EntityPlayerModel> extends RenderLiving
 
         GL11.glPushAttrib(GL11.GL_ALL_ATTRIB_BITS);
 
-        double offset = entity.getYOffset() + 0.01;
+        double offset = entity.getYOffset() + entity.posY + 0.01;
 
         pushMatrix();
         enableBlend();