LGram16
dd97ddec92
Move git root from Client/ to src/ to track all source code: - Client: Game client source (moved to Client/Client/) - Server: Game server source - GameTools: Development tools - CryptoSource: Encryption utilities - database: Database scripts - Script: Game scripts - rylCoder_16.02.2008_src: Legacy coder tools - GMFont, Game: Additional resources 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
68 lines
1.4 KiB
Plaintext
68 lines
1.4 KiB
Plaintext
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// Declare pixel shader version
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ps.1.1
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// Define c[PCN_RED_MASK] as RGBA = (scale, 0, 0, 0)
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// Where scale [0,1] is applied to reduce the magnitude
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// of the s axis component of the normal.
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// Define c[PCN_GREEN_MASK] similarly to affect the
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// t axis component
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// blue mask for r axis component (blue = up out of texture)
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//@@def c4, 0.0, 0.0, 1.0, 1.0
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def c2, 0.5, 0.5, 0.0, 0.0
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def c1, 1.0, 1.0, 0.0, 0.0
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def c3, 0.0, 0.0, 1.0, 0.0
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// Get colors from all 4 texture stages
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// These are the neighbor samples used to calculate slopes
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// for the surface displacements
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// t0 = -s, 0
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// t1 = +s, 0
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// t2 = 0, +t
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// t3 = 0, -t
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tex t0
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tex t1
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tex t2
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tex t3
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// Source height from texture alpha! This is to allow for packing
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// other data into the .rgb fields.
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sub_x4 r0.a, t0, t1 // (t0 - t1)*4 : 4 for higher scale
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mul t0.rgb, r0.a, c[5] // t0 = s result in red only
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+ sub_x4 r1.a, t3, t2 // r1 = t result in alpha
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mad r0, r1.a, c[6], t0 // r0 = red,green for s and t result
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//////
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//@@@@@ the red and green masks may scale down the displacements.
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// they are subsequently scaled up below. This looses precision, so
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// this should be re-coded to use mask values of 1.0 and scale
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// the result after.
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////////////////////////////////
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// increase scale
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// bases displacement about center 0.5 0.5
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add_x2 r0, r0, r0
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add r0, r0, c2 // bias red,green to 0.5
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add r0, r0, c3 // add blue = 1.0
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