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| author | Joe Ludwig <[email protected]> | 2013-06-26 15:22:04 -0700 |
|---|---|---|
| committer | Joe Ludwig <[email protected]> | 2013-06-26 15:22:04 -0700 |
| commit | 39ed87570bdb2f86969d4be821c94b722dc71179 (patch) | |
| tree | abc53757f75f40c80278e87650ea92808274aa59 /sp/src/public/dlight.h | |
| download | source-sdk-2013-39ed87570bdb2f86969d4be821c94b722dc71179.tar.xz source-sdk-2013-39ed87570bdb2f86969d4be821c94b722dc71179.zip | |
First version of the SOurce SDK 2013
Diffstat (limited to 'sp/src/public/dlight.h')
| -rw-r--r-- | sp/src/public/dlight.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/sp/src/public/dlight.h b/sp/src/public/dlight.h new file mode 100644 index 00000000..d2c331d8 --- /dev/null +++ b/sp/src/public/dlight.h @@ -0,0 +1,84 @@ +//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose:
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+#if !defined ( DLIGHTH )
+#define DLIGHTH
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "mathlib/vector.h"
+
+//-----------------------------------------------------------------------------
+// Dynamic light structure
+//-----------------------------------------------------------------------------
+
+enum
+{
+ DLIGHT_NO_WORLD_ILLUMINATION = 0x1,
+ DLIGHT_NO_MODEL_ILLUMINATION = 0x2,
+
+ // NOTE: These two features are used to dynamically tweak the alpha on displacements
+ // which is a special effect for selecting which texture to use. If
+ // we ever change how alpha is stored for displacements, we'll have to kill this feature
+ DLIGHT_ADD_DISPLACEMENT_ALPHA = 0x4,
+ DLIGHT_SUBTRACT_DISPLACEMENT_ALPHA = 0x8,
+ DLIGHT_DISPLACEMENT_MASK = (DLIGHT_ADD_DISPLACEMENT_ALPHA | DLIGHT_SUBTRACT_DISPLACEMENT_ALPHA),
+};
+
+// This is the lighting value that is used to determine when something can be
+// culle from lighting because it is close enough to black to be virtually black.
+//#define MIN_LIGHTING_VALUE (1.0f/256.0f)
+
+// This is the broken value of MIN_LIGHTING_VALUE that we have to take into consideration
+// to make sure that the lighting for dlights look the same as they did in HL2.
+// We'll use the real MIN_LIGHTING_VALUE above to calculate larger radii for dynamic
+// light sources.
+//#define HL2_BROKEN_MIN_LIGHTING_VALUE (20.0f/256.0f)
+
+struct dlight_t
+{
+ int flags;
+ Vector origin;
+ float radius;
+ ColorRGBExp32 color; // Light color with exponent
+ float die; // stop lighting after this time
+ float decay; // drop this each second
+ float minlight; // don't add when contributing less
+ int key;
+ int style; // lightstyle
+
+ // For spotlights. Use m_OuterAngle == 0 for point lights
+ Vector m_Direction; // center of the light cone
+ float m_InnerAngle;
+ float m_OuterAngle;
+
+ // see comments above about HL2_BROKEN_MIN_LIGHTING_VALUE and MIN_LIGHTING_VALUE
+ // THIS SHOULD ONLY GET CALLED FROM THE ENGINE
+ float GetRadius() const
+ {
+// return FastSqrt( radius * radius * ( HL2_BROKEN_MIN_LIGHTING_VALUE / MIN_LIGHTING_VALUE ) );
+ return radius;
+ }
+
+ // see comments above about HL2_BROKEN_MIN_LIGHTING_VALUE and MIN_LIGHTING_VALUE
+ // THIS SHOULD ONLY GET CALLED FROM THE ENGINE
+ float GetRadiusSquared() const
+ {
+// return radius * radius * ( HL2_BROKEN_MIN_LIGHTING_VALUE / MIN_LIGHTING_VALUE );
+ return radius * radius;
+ }
+
+ // THIS SHOULD ONLY GET CALLED FROM THE ENGINE
+ float IsRadiusGreaterThanZero() const
+ {
+ // don't bother calculating the new radius if you just want to know if it is greater than zero.
+ return radius > 0.0f;
+ }
+};
+
+#endif
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