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Hm, in this case what's the usual technique, copying content of bitmaps or swapping two sets of bitmaps (one for input and one for output) in material textures and FBO attachments in each render pass?Kjell wrote:do keep in mind that you can't use the same texture as input & output at the same time
As you probably noticed in the 2012 example i linked to earlier in this thread, i usually go with the swap approachRado1 wrote:Hm, in this case what's the usual technique, copying content of bitmaps or swapping two sets of bitmaps (one for input and one for output) in material textures and FBO attachments in each render pass?
I'm using it in the current intermediate version (triple RenderTargets, Shaders, Materials, ...), but my computations of position/size/color use common pre-computed values, so I would like to reduce them to one shader which is much better to maintain/extend.Kjell wrote:If you don't have all values affecting each other you can usually split the values over multiple buffers & shaders.
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<?xml version="1.0" encoding="iso-8859-1" ?>
<ZApplication Name="App" Caption="ZGameEditor application" FileVersion="2">
<OnLoaded>
<ZExternalLibrary ModuleName="opengl32" Source="//" DefinitionsFile="opengl.txt"/>
<ZExpression>
<Expression>
<![CDATA[// Make sure the textures are allocated
@UseMaterial(Material: RedMaterial);
@UseMaterial(Material: GreenMaterial);
//
Buffers[0] = GL_COLOR_ATTACHMENT0;
Buffers[1] = GL_COLOR_ATTACHMENT1;
//
glGenFramebuffers(1, Framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, Framebuffer);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, RedBitmap.Handle, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, GreenBitmap.Handle, 0);
glDrawBuffers(2, Buffers);]]>
</Expression>
</ZExpression>
</OnLoaded>
<OnRender>
<ZExpression>
<Expression>
<![CDATA[//
glBindFramebuffer(GL_FRAMEBUFFER, Framebuffer);]]>
</Expression>
</ZExpression>
<UseMaterial Material="FooMaterial"/>
<RenderMesh Mesh="FooMesh"/>
<ZExpression>
<Expression>
<![CDATA[//
glBindFramebuffer(GL_FRAMEBUFFER, 0);]]>
</Expression>
</ZExpression>
</OnRender>
<OnClose>
<ZExpression>
<Expression>
<![CDATA[//
glDeleteFramebuffers(1, Framebuffer);]]>
</Expression>
</ZExpression>
</OnClose>
<Content>
<Array Name="Buffers" Type="1" SizeDim1="2"/>
<Variable Name="Framebuffer" Type="1"/>
<Bitmap Name="RedBitmap" Filter="1"/>
<Material Name="RedMaterial" Shading="1" Light="0" ZBuffer="0">
<Textures>
<MaterialTexture Texture="RedBitmap" TexCoords="1"/>
</Textures>
</Material>
<Bitmap Name="GreenBitmap" Filter="1"/>
<Material Name="GreenMaterial" Shading="1" Light="0" ZBuffer="0">
<Textures>
<MaterialTexture Texture="GreenBitmap" TexCoords="1"/>
</Textures>
</Material>
<Mesh Name="FooMesh">
<Producers>
<MeshBox Grid2DOnly="255"/>
</Producers>
</Mesh>
<Shader Name="FooShader">
<VertexShaderSource>
<![CDATA[//
void main()
{
gl_Position = gl_Vertex;
}]]>
</VertexShaderSource>
<FragmentShaderSource>
<![CDATA[//
void main()
{
gl_FragData[0] = vec4(1.0, 0.0, 0.0, 1.0);
gl_FragData[1] = vec4(0.0, 1.0, 0.0, 1.0);
}]]>
</FragmentShaderSource>
</Shader>
<Material Name="FooMaterial" Shading="1" Light="0" ZBuffer="0" Shader="FooShader"/>
</Content>
</ZApplication>
. It runs real smooth here. Interesting that it is possible to compute all the scenes inside a shader.I see. I thought that all uniforms coming from ZGE ShaderVariable are only floats. If not, then of course "uniform int scene;" is better. BTW can I also pass vec* values as uniforms by ShaderVariable?VilleK wrote:I notice that the "scene" variable is a float in the computeshader. Can you change this to an "int"? Or just do "int intScene=(int)scene" and then make the switch use that. I can imagine some GPUs complaining otherwise (because a "switch" statement requires a integer).
For BallZ I take inspiration in water, sea and sea creatures...VilleK wrote:How do you come up with ideas for all these cool formations?