Hello, my Codea account was deleted for no apparent reason, I had asked a question then like 30 minutes later I come on to sign in and my account is unknown, I’m on same email and password right now, so it was in fact removed.
@Valurim I’m not sure what you want to do. What you’re doing above is drawing a red circle when you’re touching the screen, but when you lift your finger, you’re changing the circle color to black which matches the background, so you can’t see it. Try changing the background color to something other than black and you’ll see what I’m saying.
Hi, so I was looking at this code and started to wonder, is there a way I can make the state last, almost as if drawing? Because just touch by itself doesn’t do anything, could you help me here:
function draw()
background(0,0,0,255)
fill(255,0,0,255)
if CurrentTouch.state == ENDED then
fill(0, 0, 0, 255)
end
ellipse(CurrentTouch.x,CurrentTouch.y, 100)
end
How do you rotate a sprite
Here’s where I’m going to let you figure out things for yourself so you don’t have to wait on me to answer. In the upper right corner of this forum, above New Discussion is a search box. Type sprite rotation there and press the magnifying glass. That will bring up a bunch of discussions that give example of rotating a sprite. You can also find answers to any question you might have. If you can’t find what you’re looking for or you don’t understand something, let me know. I’m not trying to not answer your questions, I’m letting you find the answers so you’re not relying on or waiting for us to answer. Again, if you can’t find an answer or you don’t understand it, let me know and I’ll help. Don’t get discouraged if you can’t find what you want. There’s a lot to learn, but it’s well worth it.
@Valurim If you just need to flip a sprite as in up/down, right/left, you can try this. The last 2 numbers in each sprite line alters the size and putting a negative sign flips it.
displayMode(FULLSCREEN)
function draw()
background(40, 40, 50)
sprite("Planet Cute:Character Horn Girl",100,400,200,200) -- normal
sprite("Planet Cute:Character Horn Girl",300,400,-200,200) -- flip on x
sprite("Planet Cute:Character Horn Girl",300,200,200,-200) -- flip on y
end
displayMode(FULLSCREEN)
function setup()
x,y=100,HEIGHT/2
x1,y1=100,HEIGHT/2
x1v,y1v=1,3
px,py=0,0
pxv,pyv=8,0
mis={}
ships={}
for z=1,20 do
table.insert(ships,vec2(math.random(WIDTH,WIDTH+2000),math.random(HEIGHT)))
end
end
function draw()
background(40, 40, 50)
spritePos = vec2( WIDTH/2, HEIGHT/2 )
pushMatrix()
translate(x,y)
rotate(270)
sprite("Tyrian Remastered:Boss D",x, y)
popMatrix()
popMatrix()
rect(WIDTH-150,150,100,50)
for a,b in pairs(ships) do
sprite("Space Art:Cloudy Nebula",b.x,b.y,50)
b.x=b.x-3
if b.x<-20 then
table.remove(ships,a)
end
end
for a,b in pairs(mis) do
b.x=b.x+pxv
sprite("Space Art:Green Explosion",b.x,b.y,30)
if math.abs(px-x1)<15 and math.abs(py-y1)<15 then
sprite("Tyrian Remastered:Explosion Huge",x1,y1)
end
if b.x>WIDTH+50 then
table.remove(mis,a)
end
for c,d in pairs(ships) do
if math.abs(b.x-d.x)<20 and math.abs(b.y-d.y)<20 then
table.remove(ships,c)
table.remove(mis,a)
end
end
end
if #ships<20 then
table.insert(ships,vec2(math.random(WIDTH,WIDTH+2000),math.random(HEIGHT)))
end
end
function touched(t)
if t.state==BEGAN then
if t.x>WIDTH-150 and t.x<WIDTH-50 and t.y>150 and t.y<200 then
table.insert(mis,vec2(x,y))
end
elseif t.state==MOVING then
x=x+t.deltaX
y=y+t.deltaY
end
end
rect(WIDTH-150,100,100,50)
ellipse( 923, 78, 15, 15)
ellipse( 950, 600, 15, 15)
ellipse( 50, 171, 15, 15)
ellipse( 350, 451, 15, 15)
ellipse(836, 250, 15, 15)
ellipse(750, 769, 15, 15)
ellipse( 75, 600, 15, 15)`
So I tried another rotation format, and there is a weird glitch where sliding up brings it vertical(right) down, vice versa. The torpedos are also several ways apart from ship.
@Valurim Any time you post code, you need to put ~~~ (3 tildes) on a line before and after the code. I added them to your code above. When you use translate, the translate statement has the values of where the object is placed. Then the values of the actual object become 0,0 . See the updated code below. The translate function rotates the sprite around the x,y value. By giving the sprite some values, then you’re moving the sprite away from the point of rotation. If you want to see what happens, just create another program with just the code for translate. Start with what’s below and them alter the 0,0 values to see what really happens.
I’m not sure what you were doing with the code that I didn’t include in the blue area.
pushMatrix()
translate(x,y)
rotate(270)
sprite("Tyrian Remastered:Boss D",0,0)
popMatrix()
@Valurim Heres another version for you to try. Move the ufo up or drow and press the button to shoot. Try to hit the clouds coming from the right.
displayMode(FULLSCREEN)
function setup()
x,y=100,HEIGHT/2
x1,y1=100,HEIGHT/2
x1v,y1v=1,3
px,py=0,0
pxv,pyv=8,0
mis={}
ships={}
for z=1,20 do
table.insert(ships,vec2(math.random(WIDTH,WIDTH+2000),math.random(HEIGHT)))
end
end
function draw()
background(40, 40, 50)
sprite("Space Art:UFO",x,y)
rect(WIDTH-150,150,100,50)
for a,b in pairs(ships) do
sprite("Space Art:Cloudy Nebula",b.x,b.y,50)
b.x=b.x-3
if b.x<-20 then
table.remove(ships,a)
end
end
for a,b in pairs(mis) do
b.x=b.x+pxv
sprite("Space Art:Green Explosion",b.x,b.y,30)
if math.abs(px-x1)<15 and math.abs(py-y1)<15 then
sprite("Tyrian Remastered:Explosion Huge",x1,y1)
end
if b.x>WIDTH+50 then
table.remove(mis,a)
end
for c,d in pairs(ships) do
if math.abs(b.x-d.x)<20 and math.abs(b.y-d.y)<20 then
table.remove(ships,c)
table.remove(mis,a)
end
end
end
if #ships<20 then
table.insert(ships,vec2(math.random(WIDTH,WIDTH+2000),math.random(HEIGHT)))
end
end
function touched(t)
if t.state==BEGAN then
if t.x>WIDTH-150 and t.x<WIDTH-50 and t.y>150 and t.y<200 then
table.insert(mis,vec2(x,y))
end
elseif t.state==MOVING then
x=x+t.deltaX
y=y+t.deltaY
end
end
Is there like an ontouch function or something?
i.e
if x,y touch x1,y,1 then
sprite(explosion)
end
I’m trying to make the lazer explode the ship when it touches it
@Valurim When drawing the lines, x,y will always touch x1,y1 since a line has a starting position (x,y) and an ending position (x1,y1). There’s a raycast function that will return a value if a line drawn from one position will pass thru another position. But that involves using the physics functions which you don’t know about yet.
Instead of using a laser, shooting photon torpedoes might work better. As the torpedo moves across the screen you can compare the torpedo position to the ship position. If they’re within a certain distance of each other, the ship can explode.
@Valurim Heres an example using a torpedo. Move the ufo with one hand and fire a torpedo with the other. When the torpedo is within 15 pixels of the ship, an explosion will happen. This is simple code with the torpedo always going straight up. More code can be added to fire the torpedo in any direction, but that can be at a later time.
displayMode(FULLSCREEN)
function setup()
x,y=WIDTH/2,HEIGHT/2
x1,y1=0,0
x1v,y1v=1,3
px,py=0,0
pxv,pyv=0,8
end
function draw()
background(40, 40, 50)
sprite("Space Art:UFO",x,y)
noStroke()
rect(WIDTH-150,100,100,50)
sprite("Space Art:Red Ship Icon",x1,y1)
x1=x1+x1v
y1=y1+y1v
if x1>WIDTH or x1<0 then
x1v=x1v*-1
end
if y1>HEIGHT or y1<0 then
y1v=y1v*-1
end
sprite("Space Art:Green Explosion",px,py,30)
if px>0 or py>0 then
px=px+pxv
py=py+pyv
end
if math.abs(px-x1)<15 and math.abs(py-y1)<15 then
sprite("Tyrian Remastered:Explosion Huge",x1,y1)
end
end
function touched(t)
if t.state==BEGAN then
if t.x>WIDTH-150 and t.x<WIDTH-50 and t.y>100 and t.y<150 then
px=x
py=y
end
elseif t.state==MOVING then
x=x+t.deltaX
y=y+t.deltaY
end
end
@Valurim Here’s something you can play around with.
displayMode(FULLSCREEN)
function setup()
x,y=WIDTH/2,HEIGHT/2
x1,y1=0,0
x1v,y1v=2,4
end
function draw()
background(40, 40, 50)
sprite("Space Art:UFO",x,y)
noStroke()
rect(WIDTH-150,100,100,50)
if laz then
stroke(49, 178, 239, 118)
strokeWidth(12)
line(x+45,y,x1,y1)
line(x-45,y,x1,y1)
stroke(255, 204, 0, 255)
strokeWidth(4)
line(x+45,y,x1,y1)
line(x-45,y,x1,y1)
end
sprite("Space Art:Red Ship Icon",x1,y1)
x1=x1+x1v
y1=y1+y1v
if x1>WIDTH or x1<0 then
x1v=x1v*-1
end
if y1>HEIGHT or y1<0 then
y1v=y1v*-1
end
end
function touched(t)
if t.state==BEGAN then
if t.x>WIDTH-150 and t.x<WIDTH-50 and t.y>100 and t.y<150 then
laz=true
end
elseif t.state==MOVING then
x=x+t.deltaX
y=y+t.deltaY
elseif t.state==ENDED then
laz=false
end
end
Is there a way to add like a delay? Because If I swipe to move the ship over constantly, the laser ends, resetting it so could I do like:
sleep(500)
laz=false
Or something Like that?
You can move the ship with one hand and shoot the laser with the other.
If you don’t want the laser coming from the center, then you can alter the x value in the if laz routine in the function draw.
Thank you
Where is the option where X and Y where I would change where the laser is coming from on the ship?
Not sure what happened to your account, but here’s an answer to your last question.
displayMode(FULLSCREEN)
function setup()
x,y=WIDTH/2,HEIGHT/2
xv,yv=0,0
end
function draw()
background(40, 40, 50)
sprite("Space Art:UFO",x,y)
noStroke()
rect(WIDTH-150,100,100,50)
if laz then
stroke(49, 178, 239, 118)
strokeWidth(12)
line(x,y,x,y+WIDTH)
stroke(255, 204, 0, 255)
strokeWidth(4)
line(x,y,x,y+WIDTH)
end
end
function touched(t)
if t.state==BEGAN then
if t.x>WIDTH-150 and t.x<WIDTH-50 and t.y>100 and t.y<150 then
laz=true
end
elseif t.state==MOVING then
x=x+t.deltaX
y=y+t.deltaY
elseif t.state==ENDED then
laz=false
end
end
Yes I know, that’s so when you draw it disappears when you lift, making it more natural. I’m trying to make it so a trail stays behind it, like drawing. So as you drag your finger across it “paints.” Changing the ENDED fill to red won’t do that, that just makes the red ball stay wherever you left off.