52 lines
2.3 KiB
C++
52 lines
2.3 KiB
C++
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internal assembly
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ConstructAssemblyFromDefinition (assembly_definition Definition,
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string AssemblyName,
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v3 RootPosition,
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r32 Scale,
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context Context)
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{
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assembly Assembly = {};
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s32 MemorySize = AssemblySize(Definition.TotalLEDCount, AssemblyName.Length);
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Assembly.Memory = AllocateNonGrowableArenaWithSpace(Context.PlatformAlloc, MemorySize);
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Assembly.Name = MakeString(PushArray(&Assembly.Memory, char, AssemblyName.Length),
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AssemblyName.Length);
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CopyStringTo(AssemblyName, &Assembly.Name);
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// NOTE(Peter): Setting this to zero so we can check at the end of the loop that creates leds
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// and make sure we created to correct number. By the time this function returns it should be
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// the case that: (Assembly.LEDCount == Definition.TotalLEDCount)
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Assembly.LEDCount = 0;
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Assembly.Colors = PushArray(&Assembly.Memory, pixel, Definition.TotalLEDCount);
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Assembly.LEDs = PushArray(&Assembly.Memory, led, Definition.TotalLEDCount);
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// Add LEDs
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for (s32 StripIdx = 0; StripIdx < Definition.LEDStripCount; StripIdx++)
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{
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led_strip_definition StripDef = Definition.LEDStrips[StripIdx];
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// NOTE(Peter): this should be a switch on the type, but we only have one for
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// now. The assert is to remind you to create more cases when necessary
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Assert(StripDef.InterpolationType == StripInterpolate_Points);
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v4 WS_StripStart = V4(StripDef.InterpolatePositionStart * Scale, 1);
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v4 WS_StripEnd = V4(StripDef.InterpolatePositionEnd * Scale, 1);
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s32 LEDsInStripCount = StripDef.LEDsPerStrip;
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Assert(Assembly.LEDCount + LEDsInStripCount <= Definition.TotalLEDCount);
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v4 SingleStep = (WS_StripEnd - WS_StripStart) / (r32)LEDsInStripCount;
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for (s32 Step = 0; Step < LEDsInStripCount; Step++)
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{
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s32 LEDIndex = Assembly.LEDCount++;
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Assembly.LEDs[LEDIndex].Position = WS_StripStart + (SingleStep * Step);
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Assembly.LEDs[LEDIndex].Index = LEDIndex;
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}
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}
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// NOTE(Peter): Did we create the correct number of LEDs?
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Assert(Assembly.LEDCount == Definition.TotalLEDCount);
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return Assembly;
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}
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