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something to show, something to ask
#17623
09/27/03 22:02
09/27/03 22:02
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Joined: Oct 2002
Posts: 8,939 planet.earth
ello
OP
Senior Expert
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OP
Senior Expert
Joined: Oct 2002
Posts: 8,939
planet.earth
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i put my hands onto the assembler language(the brute force way of coding): the files - i'd like to know if this works on other computers, too. now the questions: in the beta text there are some descriptions for v0[3] - position v3[3] - normal v7[2] - tex coord1 v8[2] - tex coord2 but in a description i found thy are somehow different and described as read only,so why do they vary: v0[3] - position x,y,z,w v1[3] - vertex weight w,0,0,1 v2[3] - normal x,y,z,1 v3[3] - primary color r,g,b,a v4[3] - secondary color r,g,b,a v5[3] - fog coefficient fc,0,0,1 v6[3] - tex coord1 s,t,r,q v7[3] - tex coord2 s,t,r,q however there is no description of the symbols like s,t,q,r - what do they stand for and why are there 4 values for the texture coordinates instead of 2 like in beta text and by the way, can anyone show me how to code a counter, or tell me how to use add and mul for example. i always get errors when i pu my hands on them.
www.earthcontrol.dequoted: We want to maintain a clean, decent, American family suited forum look... which means you may post zombies or chainsaw massacres, but no erotic.
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Re: something to show, something to ask
[Re: ello]
#17625
09/28/03 02:29
09/28/03 02:29
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Joined: May 2002
Posts: 7,441
ventilator
Senior Expert
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Senior Expert
Joined: May 2002
Posts: 7,441
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v0[3] - position
v3[3] - normal
v7[2] - tex coord1
v8[2] - tex coord2
the vertex data gets provided by the engine. you can't use anything different!
s,t,r,q are four dimensional texture coordinates. with a6 you just can use u,v which is the same as s,t i guess?
you can't do loops in vertex shader version 1.1! ...for what purpose would you like to have a counter?
add and mul works like that:
Code:
add r0,r1,r2 does r0.x=r1.x+r2.x, r0.y=r1.y+r2.y, r0.z=r1.z+r2.z, r0.w=r1.w+r2.w
mul r0,r1,r2 does r0.x=r1.x*r2.x, r0.y=r1.y*r2.y, r0.z=r1.z*r2.z, r0.w=r1.w*r2.w
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Re: something to show, something to ask
[Re: ventilator]
#17626
09/28/03 18:02
09/28/03 18:02
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Joined: Oct 2002
Posts: 8,939 planet.earth
ello
OP
Senior Expert
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OP
Senior Expert
Joined: Oct 2002
Posts: 8,939
planet.earth
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so, if they are provided by the engine, i could need a complete overview which are available, cause the general informations on vertex and pixel shader assembler available on the net are different to the ones which come with the engine. so i cannot use them and i dont know which ones i can use. i also like to see an example on how to implement a pixel shader , in betatext there is only vertex shader. i have some examples for pixel shader assembler, but i dont know how to implement them into a6.
so registers get cleared before the next run of the asm-script? then actually i dont need a counter.
www.earthcontrol.dequoted: We want to maintain a clean, decent, American family suited forum look... which means you may post zombies or chainsaw massacres, but no erotic.
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Re: something to show, something to ask
[Re: ello]
#17627
09/28/03 21:01
09/28/03 21:01
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Joined: May 2002
Posts: 7,441
ventilator
Senior Expert
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Senior Expert
Joined: May 2002
Posts: 7,441
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Quote:
so registers get cleared before the next run of the asm-script?
yes, registers don't keep their contents when the vertexshader ends. the shader gets executed for each vertex individually and only information about the current vertex is known.
Quote:
i also like to see an example on how to implement a pixel shader, in betatext there is only vertex shader.
have a look at my terrain multitexturing shader! it's a very simple vertex/pixelshader example.
Quote:
so, if they are provided by the engine, i could need a complete overview which are available, cause the general informations on vertex and pixel shader assembler available on the net are different to the ones which come with the engine.
it's always
v0[3] - position v3[3] - normal v7[2] - tex coord1 v8[2] - tex coord2
with a6! nothing else is available.
v8 is a second texture coordinate set which is used for the shadowmaps on levelgeometry i guess. so you won't need this for models, terrains or sprites.
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Re: something to show, something to ask
[Re: ventilator]
#17628
09/29/03 02:33
09/29/03 02:33
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Joined: Oct 2002
Posts: 8,939 planet.earth
ello
OP
Senior Expert
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OP
Senior Expert
Joined: Oct 2002
Posts: 8,939
planet.earth
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thanks for clearing me up.
i saw your script just after i posted this questions, i did some tweaking here and there , get many many errors, because of the usage of the registers i think.
somehow i get strange results. i got a nice texture movement(it went into the direction of a refraction-like style), but only if the entity moves/rotates..
how are you going on this. i always get a large amount of errors, befor i see anything.
I saw many VertexShaderConstant[x] definitions. is that the cx register used in the shader itself?
www.earthcontrol.dequoted: We want to maintain a clean, decent, American family suited forum look... which means you may post zombies or chainsaw massacres, but no erotic.
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