Launching in direction looking?

[GravityWolf]

I am fairly new to making mods, and I am making an item that launches you up and sends you launching in the direction you are looking. Here is the code I am currently using to make the player launch up when they right click with the item:

 

@Override
public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {

	player.motionY = 0.7;
	return itemStack;

}

 

Any ideas? Thanks!

[hydroflame]

my teleport spell uses thsi

 

 

double motionX = 20 * (double) (-MathHelper.sin(player.rotationYaw/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * f);
	double motionZ = 20 * (double) (MathHelper.cos(player.rotationYaw	/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * f);
	double motionY = 20 * (double) (-MathHelper.sin((player.rotationPitch)/ 180.0F * (float) Math.PI) * f);

[GravityWolf]

my teleport spell uses thsi

 

 

double motionX = 20 * (double) (-MathHelper.sin(player.rotationYaw/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * f);
	double motionZ = 20 * (double) (MathHelper.cos(player.rotationYaw	/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * f);
	double motionY = 20 * (double) (-MathHelper.sin((player.rotationPitch)/ 180.0F * (float) Math.PI) * f);

 

On "* f" It gives me an error, are you using a variable that you had or something? It crashes when I use the item.

[hydroflame]

lolol, yes, its technily 0.4f but you could tottally remove it and it wouldnt change anything

[GravityWolf]

lolol, yes, its technily 0.4f but you could tottally remove it and it wouldnt change anything

 

Hmm..I put it in my onItemRightclick method and it does nothing...here is this code:

 

@Override
public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {

	player.motionY = 0.7;
	double motionX = 20 * (double) (-MathHelper.sin(player.rotationYaw/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * 0.4f);
	double motionZ = 20 * (double) (MathHelper.cos(player.rotationYaw	/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * 0.4f);
	double motionY = 20 * (double) (-MathHelper.sin((player.rotationPitch)/ 180.0F * (float) Math.PI) * 0.4f);

	return itemStack;

}

 

Sorry about my noobishness, I am new to modding like I said 

 

Edit: Is Pi already in Eclipse/Forge/Minecraft, or is it another class you have? Same with MathHelper.

[hydroflame]

new to coding ?

 

ok lets take it step by step

 

double motionX = 20 * (double) (-MathHelper.sin(player.rotationYaw/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * 0.4f);
	double motionZ = 20 * (double) (MathHelper.cos(player.rotationYaw	/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * 0.4f);
	double motionY = 20 * (double) (-MathHelper.sin((player.rotationPitch)/ 180.0F * (float) Math.PI) * 0.4f);

 

so heres my code, basicly it will calculate the translation on all 3 different axis

 

double motionX = 3;
double motionY = 3;
double motionZ = 3;

 

so this code would technicly tell the program

"yo btw i have 3 variable, one called motionX and value of 3, one called motionY and value of 3 and a last one called motionZ and value of 3"

 

now this does NOTHIGN on its own because all it says is  "hey i have these values" it doesnt do anythign with them

 

now lets take a look at your line of code

player.motionY = 0.7;

basicly this is saying to the program

"btw buddy, can you take the "player" and take a look at its "motionY" value, and while you're there can you assign it the value of 0.7"

 

now im going to write one of the 3 lines requires to make this work and youll write the 2 other

 

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {

	player.motionY = 0.7;
	double calculatedX= 20 * (double) (-MathHelper.sin(player.rotationYaw/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * 0.4f);
	double calculatedZ = 20 * (double) (MathHelper.cos(player.rotationYaw	/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * 0.4f);
	double calculatedY = 20 * (double) (-MathHelper.sin((player.rotationPitch)/ 180.0F * (float) Math.PI) * 0.4f);
	 player.motionY = calculatedY;
                 //another line of code for another axis
                 //another line of code for the last axis

	return itemStack;

}

[GravityWolf]

Lol I feel like such a noob...says calculated(x y and z) cannot be resolved to a variable I am trying to get better

[hydroflame]

look at my secodn code, notice [glow=red,2,300]the variable names[/glow] ive change them to make thigns clearer

[GravityWolf]

look at my secodn code, notice [glow=red,2,300]the variable names[/glow] ive change them to make thigns clearer

 

Thank you sooooooooo much!!! Applause for you!  Works perfectly! Now how to figure out how to negate fall damage!

[kaikaii99]

to negate fall damage do this: (based on hydro's code)

 

public ItemStack onItemRightClick(ItemStack itemStack, World world, EntityPlayer player) {

 

 

double calculatedX= 20 * (double) (-MathHelper.sin(player.rotationYaw/ 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * 0.4f);

double calculatedZ = 20 * (double) (MathHelper.cos(player.rotationYaw / 180.0F * (float) Math.PI)* MathHelper.cos(player.rotationPitch / 180.0F* (float) Math.PI) * 0.4f);

double calculatedY = 20 * (double) (-MathHelper.sin((player.rotationPitch)/ 180.0F * (float) Math.PI) * 0.4f);

 

          player.fallDamage = 0.0F;

               

          player.motionY = calculatedY;

                //another line of code for another axis

                //another line of code for the last axis

 

return itemStack;

 

}