shaders: Add GLSL port of particle shaders.

Author: CrossVR

res/gamedata/shaders/gl/iostructs/p_particle.h

@@ -0,0 +1,35 @@
+
+out vec4 SV_Target;
+in vec4 gl_FragCoord;
+
+struct v2p
+{
+	float2 tc0	; // TEXCOORD0;
+	float4 c	; // COLOR0;
+
+//	Igor: for additional depth dest
+#ifdef	USE_SOFT_PARTICLES
+	float4 tctexgen	; // TEXCOORD1;
+#endif	//	USE_SOFT_PARTICLES
+
+	float4 hpos	; // SV_Position;
+};
+
+layout(location = TEXCOORD0) 	in float2	p_particle_tc	; // TEXCOORD0;
+layout(location = COLOR0) 		in float4	p_particle_c	; // COLOR0;
+#ifdef	USE_SOFT_PARTICLES
+layout(location = TEXCOORD1) 	in float4	p_particle_tctexgen; // TEXCOORD1;
+#endif	//	USE_SOFT_PARTICLES
+
+float4 _main ( v2p I );
+
+void main()
+{
+	v2p			I;
+	I.tc0		= p_particle_tc;
+	I.c 		= p_particle_c;
+	I.tctexgen 	= p_particle_tctexgen;
+	I.hpos		= gl_FragCoord;
+
+	SV_Target	= _main (I);
+}

res/gamedata/shaders/gl/iostructs/v_particle.h

@@ -0,0 +1,49 @@
+
+out gl_PerVertex { vec4 gl_Position; };
+
+struct vv
+{
+	float4 P	; // POSITION;
+	float2 tc	; // TEXCOORD0;
+	float4 c	; // COLOR0;
+};
+
+struct v2p
+{
+	float2 tc	; // TEXCOORD0;
+	float4 c	; // COLOR0;
+
+//	Igor: for additional depth dest
+#ifdef	USE_SOFT_PARTICLES
+	float4 tctexgen	; // TEXCOORD1;
+#endif	//	USE_SOFT_PARTICLES
+
+	float4 hpos	; // SV_Position;
+};
+
+layout(location = POSITION)		in float4	v_particle_P	; // POSITION;
+layout(location = TEXCOORD0)	in float2	v_particle_tc	; // TEXCOORD0;
+layout(location = COLOR)		in float4	v_particle_c	; // COLOR; 
+
+layout(location = TEXCOORD0) 	out float2	v2p_particle_tc	; // TEXCOORD0;
+layout(location = COLOR0) 		out float4	v2p_particle_c	; // COLOR0;
+#ifdef	USE_SOFT_PARTICLES
+layout(location = TEXCOORD1) 	out float4	v2p_particle_tctexgen; // TEXCOORD1;
+#endif	//	USE_SOFT_PARTICLES
+
+v2p _main ( vv I );
+
+void main()
+{
+	vv		I;
+	I.P		= v_particle_P;
+	I.tc	= v_particle_tc;
+	I.c 	= v_particle_c;
+
+	v2p O 	= _main (I);
+
+	v2p_particle_tc = O.tc;
+	v2p_particle_c = O.c;
+	v2p_particle_tctexgen = O.tctexgen;
+	gl_Position = O.hpos;
+}

res/gamedata/shaders/gl/particle-clip.vs

@@ -0,0 +1,15 @@
+#include "common.h"
+#include "iostructs\v_particle.h"
+
+v2p _main (vv v)
+{
+	v2p 		o;
+
+	o.hpos 		= mul	(m_WVP, v.P);		// xform, input in world coords
+	o.hpos.z	= abs	(o.hpos.z);
+	o.hpos.w	= abs	(o.hpos.w);
+	o.tc		= v.tc;				// copy tc
+	o.c		= v.c;				// copy color
+
+	return o;
+}

res/gamedata/shaders/gl/particle.ps

@@ -0,0 +1,22 @@
+#include "common.h"
+#include "iostructs\v_particle.h"
+
+uniform float4x4 	mVPTexgen;
+
+v2p _main (vv v)
+{
+	v2p 		o;
+
+	o.hpos 		= mul	(m_WVP, v.P);		// xform, input in world coords
+//	o.hpos 		= mul	(m_VP, v.P);		// xform, input in world coords
+	o.tc		= v.tc;				// copy tc
+	o.c			= unpack_D3DCOLOR(v.c);				// copy color
+
+//	Igor: for additional depth dest
+#ifdef	USE_SOFT_PARTICLES
+	o.tctexgen 	= mul( mVPTexgen, v.P);
+	o.tctexgen.z	= o.hpos.z;
+#endif	//	USE_SOFT_PARTICLES
+
+	return o;
+}