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Add map-like rendering for pocket computers #497

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2 changes: 2 additions & 0 deletions src/main/java/dan200/computercraft/client/proxy/ComputerCraftProxyClient.java
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@

import dan200.computercraft.ComputerCraft;
import dan200.computercraft.client.gui.*;
import dan200.computercraft.client.render.ItemPocketRenderer;
import dan200.computercraft.client.render.TileEntityMonitorRenderer;
import dan200.computercraft.shared.computer.blocks.ComputerState;
import dan200.computercraft.shared.computer.blocks.TileComputer;
Expand Down Expand Up @@ -442,6 +443,7 @@ private void registerForgeHandlers()
{
ForgeHandlers handlers = new ForgeHandlers();
MinecraftForge.EVENT_BUS.register( handlers );
MinecraftForge.EVENT_BUS.register( new ItemPocketRenderer() );
}

public class ForgeHandlers
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264 changes: 264 additions & 0 deletions src/main/java/dan200/computercraft/client/render/ItemPocketRenderer.java
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@@ -0,0 +1,264 @@
package dan200.computercraft.client.render;


import dan200.computercraft.ComputerCraft;
import dan200.computercraft.client.gui.FixedWidthFontRenderer;
import dan200.computercraft.core.terminal.Terminal;
import dan200.computercraft.core.terminal.TextBuffer;
import dan200.computercraft.shared.computer.core.ClientComputer;
import dan200.computercraft.shared.pocket.items.ItemPocketComputer;
import dan200.computercraft.shared.util.Palette;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.ItemRenderer;
import net.minecraft.client.renderer.RenderItem;
import net.minecraft.client.renderer.block.model.IBakedModel;
import net.minecraft.client.renderer.block.model.ItemCameraTransforms;
import net.minecraft.client.renderer.texture.TextureManager;
import net.minecraft.client.renderer.texture.TextureMap;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.util.EnumHand;
import net.minecraft.util.EnumHandSide;
import net.minecraft.util.math.MathHelper;
import net.minecraftforge.client.ForgeHooksClient;
import net.minecraftforge.client.event.RenderSpecificHandEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
import org.lwjgl.opengl.GL11;

import static dan200.computercraft.client.gui.FixedWidthFontRenderer.FONT_HEIGHT;
import static dan200.computercraft.client.gui.FixedWidthFontRenderer.FONT_WIDTH;

/**
* Emulates map rendering for pocket computers
*/
@SideOnly(Side.CLIENT)
public class ItemPocketRenderer
{
@SubscribeEvent
public void renderItem( RenderSpecificHandEvent event )
{
ItemStack stack = event.getItemStack();
if( !(stack.getItem() instanceof ItemPocketComputer) ) return;

event.setCanceled( true );

EntityPlayer player = Minecraft.getMinecraft().player;

GlStateManager.pushMatrix();
if( event.getHand() == EnumHand.MAIN_HAND && player.getHeldItemOffhand().isEmpty() )
{
renderItemFirstCentre(
event.getInterpolatedPitch(),
event.getEquipProgress(),
event.getSwingProgress(),
stack
);
}
else
{
renderItemFirstPersonSide(
event.getHand() == EnumHand.MAIN_HAND ? player.getPrimaryHand() : player.getPrimaryHand().opposite(),
event.getEquipProgress(),
event.getSwingProgress(),
stack
);
}
GlStateManager.popMatrix();
}

/**
* The main rendering method for pocket computers and their associated terminal
*
* @param stack The stack to render
* @see ItemRenderer#renderMapFirstPerson(ItemStack)
*/
private void renderPocketComputerItem( ItemStack stack )
{
// Setup various transformations. Note that these are partially adapated from the corresponding method
// in ItemRenderer
GlStateManager.disableLighting();

GlStateManager.rotate( 180f, 0f, 1f, 0f );
GlStateManager.rotate( 180f, 0f, 0f, 1f );
GlStateManager.scale( 0.5, 0.5, 0.5 );

ItemPocketComputer pocketComputer = ComputerCraft.Items.pocketComputer;
ClientComputer computer = pocketComputer.createClientComputer( stack );

{
// First render the background item. We use the item's model rather than a direct texture as this ensures
// we display the pocket light and other such decorations.
GlStateManager.pushMatrix();

GlStateManager.scale( 1.0f, -1.0f, 1.0f );

Minecraft minecraft = Minecraft.getMinecraft();
TextureManager textureManager = minecraft.getTextureManager();
RenderItem renderItem = minecraft.getRenderItem();

// Copy of RenderItem#renderItemModelIntoGUI but without the translation or scaling
textureManager.bindTexture( TextureMap.LOCATION_BLOCKS_TEXTURE );
textureManager.getTexture( TextureMap.LOCATION_BLOCKS_TEXTURE ).setBlurMipmap( false, false );

GlStateManager.enableRescaleNormal();
GlStateManager.enableAlpha();
GlStateManager.alphaFunc( GL11.GL_GREATER, 0.1F );
GlStateManager.enableBlend();
GlStateManager.blendFunc( GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA );
GlStateManager.color( 1.0F, 1.0F, 1.0F, 1.0F );

IBakedModel bakedmodel = renderItem.getItemModelWithOverrides( stack, null, null );
bakedmodel = ForgeHooksClient.handleCameraTransforms( bakedmodel, ItemCameraTransforms.TransformType.GUI, false );
renderItem.renderItem( stack, bakedmodel );

GlStateManager.disableAlpha();
GlStateManager.disableRescaleNormal();

GlStateManager.popMatrix();
}

// If we've a computer and terminal then attempt to render it.
if( computer != null )
{
Terminal terminal = computer.getTerminal();
if( terminal != null )
{
synchronized( terminal )
{
GlStateManager.pushMatrix();
GlStateManager.disableDepth();

// Reset the position to be at the top left corner of the pocket computer
// Note we translate towards the screen slightly too.
GlStateManager.translate( -8 / 16.0, -8 / 16.0, 0.5 / 16.0 );
// Translate to the top left of the screen.
GlStateManager.translate( 4 / 16.0, 3 / 16.0, 0 );

// Work out the scaling required to resize the terminal in order to fit on the computer
final int margin = 2;
int tw = terminal.getWidth();
int th = terminal.getHeight();
int width = tw * FONT_WIDTH + margin * 2;
int height = th * FONT_HEIGHT + margin * 2;
int max = Math.max( height, width );

// The grid is 8 * 8 wide, so we start with a base of 1/2 (8 / 16).
double scale = 1.0 / 2.0 / max;
GlStateManager.scale( scale, scale, scale );

// The margin/start positions are determined in order for the terminal to be centred.
int startX = (max - width) / 2 + margin;
int startY = (max - height) / 2 + margin;

FixedWidthFontRenderer fontRenderer = (FixedWidthFontRenderer) ComputerCraft.getFixedWidthFontRenderer();
boolean greyscale = !computer.isColour();
Palette palette = terminal.getPalette();

// Render the actual text
for( int line = 0; line < th; ++line )
{
TextBuffer text = terminal.getLine( line );
TextBuffer colour = terminal.getTextColourLine( line );
TextBuffer backgroundColour = terminal.getBackgroundColourLine( line );
fontRenderer.drawString(
text, startX, startY + line * FONT_HEIGHT,
colour, backgroundColour, margin, margin, greyscale, palette
);
}

// And render the cursor;
int tx = terminal.getCursorX(), ty = terminal.getCursorY();
if( terminal.getCursorBlink() && ComputerCraft.getGlobalCursorBlink() &&
tx >= 0 && ty >= 0 && tx < tw && ty < th )
{
TextBuffer cursorColour = new TextBuffer( "0123456789abcdef".charAt( terminal.getTextColour() ), 1 );
fontRenderer.drawString(
new TextBuffer( '_', 1 ), startX + FONT_WIDTH * tx, startY + FONT_HEIGHT * ty,
cursorColour, null, 0, 0, greyscale, palette
);
}

GlStateManager.enableDepth();
GlStateManager.popMatrix();
}
}
}

GlStateManager.enableLighting();
}

/**
* Renders a pocket computer to one side of the player.
*
* @param side The side to render on
* @param equipProgress The equip progress of this item
* @param swingProgress The swing progress of this item
* @param stack The stack to render
* @see ItemRenderer#renderMapFirstPersonSide(float, EnumHandSide, float, ItemStack)
*/
private void renderItemFirstPersonSide( EnumHandSide side, float equipProgress, float swingProgress, ItemStack stack )
{
Minecraft minecraft = Minecraft.getMinecraft();
float offset = side == EnumHandSide.RIGHT ? 1f : -1f;
GlStateManager.translate( offset * 0.125f, -0.125f, 0f );

// If the player is not invisible then render a single arm
if( !minecraft.player.isInvisible() )
{
GlStateManager.pushMatrix();
GlStateManager.rotate( offset * 10f, 0f, 0f, 1f );
minecraft.getItemRenderer().renderArmFirstPerson( equipProgress, swingProgress, side );
GlStateManager.popMatrix();
}

// Setup the appropriate transformations. This is just copied from the
// corresponding method in ItemRenderer.
GlStateManager.pushMatrix();
GlStateManager.translate( offset * 0.51f, -0.08f + equipProgress * -1.2f, -0.75f );
float f1 = MathHelper.sqrt( swingProgress );
float f2 = MathHelper.sin( f1 * (float) Math.PI );
float f3 = -0.5f * f2;
float f4 = 0.4f * MathHelper.sin( f1 * ((float) Math.PI * 2f) );
float f5 = -0.3f * MathHelper.sin( swingProgress * (float) Math.PI );
GlStateManager.translate( offset * f3, f4 - 0.3f * f2, f5 );
GlStateManager.rotate( f2 * -45f, 1f, 0f, 0f );
GlStateManager.rotate( offset * f2 * -30f, 0f, 1f, 0f );

renderPocketComputerItem( stack );

GlStateManager.popMatrix();
}

/**
* Render an item in the middle of the screen
*
* @param pitch The pitch of the player
* @param equipProgress The equip progress of this item
* @param swingProgress The swing progress of this item
* @param stack The stack to render
* @see ItemRenderer#renderMapFirstPerson(float, float, float)
*/
private void renderItemFirstCentre( float pitch, float equipProgress, float swingProgress, ItemStack stack )
{
ItemRenderer itemRenderer = Minecraft.getMinecraft().getItemRenderer();

// Setup the appropriate transformations. This is just copied from the
// corresponding method in ItemRenderer.
float swingRt = MathHelper.sqrt( swingProgress );
float tX = -0.2f * MathHelper.sin( swingProgress * (float) Math.PI );
float tZ = -0.4f * MathHelper.sin( swingRt * (float) Math.PI );
GlStateManager.translate( 0f, -tX / 2f, tZ );
float pitchAngle = itemRenderer.getMapAngleFromPitch( pitch );
GlStateManager.translate( 0f, 0.04f + equipProgress * -1.2f + pitchAngle * -0.5f, -0.72f );
GlStateManager.rotate( pitchAngle * -85f, 1f, 0f, 0f );
itemRenderer.renderArms();
float rX = MathHelper.sin( swingRt * (float) Math.PI );
GlStateManager.rotate( rX * 20f, 1f, 0f, 0f );
GlStateManager.scale( 2f, 2f, 2f );

renderPocketComputerItem( stack );
}
}
4 changes: 4 additions & 0 deletions src/main/resources/META-INF/computercraft_at.cfg
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@@ -1,3 +1,7 @@
# RecordMedia (and related methods)
public net.minecraft.item.ItemRecord field_185076_b # sound
public net.minecraft.item.ItemRecord field_185077_c # displayName
# ItemPocketRenderer
public net.minecraft.client.renderer.ItemRenderer func_187466_c()V # renderArms
public net.minecraft.client.renderer.ItemRenderer func_178100_c(F)F # getMapAngleFromPitch
public net.minecraft.client.renderer.ItemRenderer func_187456_a(FFLnet/minecraft/util/EnumHandSide;)V # renderArmFirstPerson