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modules/wallpaper-engine/shaders/genericropeparticle.vert

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+
+#include "common_particles.h"
+
+#if GS_ENABLED || HLSL_GS40
+/////////////////////////
+// Geometry shader
+/////////////////////////
+#if THICKFORMAT
+attribute vec4 a_PositionVec4;
+attribute vec4 a_TexCoordVec4;
+attribute vec4 a_TexCoordVec4C1;
+attribute vec4 a_TexCoordVec4C2;
+attribute vec4 a_TexCoordVec4C3;
+attribute vec4 a_Color;
+
+varying vec4 v_EndPoint;
+varying vec4 v_Color2;
+#else
+attribute vec4 a_PositionVec4;
+attribute vec4 a_TexCoordVec4;
+attribute vec4 a_TexCoordVec4C1;
+attribute vec3 a_TexCoordVec3C2;
+attribute vec4 a_Color;
+
+varying vec3 v_EndPoint;
+#endif
+
+varying vec4 v_Color;
+
+varying vec3 v_CPStart;
+varying vec3 v_CPEnd;
+varying vec2 v_UVMinMax;
+
+void main() {
+
+#define in_ParticleSize (a_PositionVec4.w)
+#define in_SegmentUVTimeOffset (g_RenderVar0.z)
+#define in_SegmentMaxCount (g_RenderVar0.w)
+#define in_ParticleTrailLength (a_TexCoordVec4.w)
+#define in_ParticleTrailPosition (a_TexCoordVec4C1.w)
+#define in_SplineCP0 (a_TexCoordVec4C1.xyz)
+
+	gl_Position = vec4(a_PositionVec4.xyz, in_ParticleSize);
+	v_EndPoint.xyz = a_TexCoordVec4.xyz;
+
+	float usableLength = in_ParticleTrailLength - 1;
+
+#if THICKFORMAT
+#define in_SplineCP1 (a_TexCoordVec4C2.xyz)
+
+	v_EndPoint.w = a_TexCoordVec4C2.w;
+
+	// New particles are at the end of the array
+	float uvMinimum = 1.0 - (in_ParticleTrailPosition) / usableLength;
+	float uvDelta = -1.0 / usableLength;
+	//uvMinimum += uvDelta;
+	v_Color2 = a_TexCoordVec4C3;
+#else
+#define in_SplineCP1 (a_TexCoordVec3C2.xyz)
+
+	// Still spawning new elements, extend to physical end of trail
+	if (in_ParticleTrailLength < in_SegmentMaxCount)
+	{
+		usableLength += in_SegmentUVTimeOffset;
+	}
+	
+	float uvMinimum = (in_ParticleTrailPosition - (1.0 - in_SegmentUVTimeOffset)) / usableLength;
+	float uvDelta = 1.0 / usableLength;
+	
+	// The first element is shorter based on the history timer and always starts and UV 0
+	if (in_ParticleTrailPosition < 0.5)
+	{
+		uvMinimum = 0.0;
+		uvDelta = in_SegmentUVTimeOffset / usableLength;
+	}
+#endif
+
+	v_UVMinMax.x = uvMinimum;
+	v_UVMinMax.y = uvMinimum + uvDelta;
+
+	v_Color = a_Color;
+	v_CPStart = a_PositionVec4.xyz - in_SplineCP0;
+	v_CPEnd = v_EndPoint.xyz - in_SplineCP1;
+
+	vec3 dt = v_EndPoint.xyz - a_PositionVec4.xyz;
+	v_CPStart = v_CPStart + dt;
+	v_CPEnd = v_CPEnd - dt;
+}
+
+#else
+
+/////////////////////////
+// No geometry shader
+/////////////////////////
+
+attribute vec4 a_PositionVec4;
+attribute vec4 a_TexCoordVec4;
+attribute vec4 a_TexCoordVec4C1;
+
+#if THICKFORMAT
+attribute vec4 a_TexCoordVec4C2;
+attribute vec4 a_TexCoordVec4C3;
+attribute vec2 a_TexCoordC4;
+#else
+attribute vec3 a_TexCoordVec3C2;
+attribute vec2 a_TexCoordC3;
+#endif
+
+attribute vec4 a_Color;
+
+varying vec4 v_Color;
+
+#if FOG_DIST || FOG_HEIGHT
+uniform mat4 g_ModelMatrix;
+varying vec4 v_ViewDir;
+#endif
+
+varying vec2 v_TexCoord;
+
+void main() {
+
+#define in_SegmentUVTimeOffset (g_RenderVar0.z)
+#define in_SegmentMaxCount (g_RenderVar0.w)
+#define in_ParticleTrailLength (a_TexCoordVec4.w)
+#define in_ParticleTrailPosition (a_TexCoordVec4C1.w)
+
+	// Prepare input layout
+	vec3 startPosition = a_PositionVec4.xyz;
+	vec3 endPosition = a_TexCoordVec4.xyz;
+	vec3 CPStart = startPosition - a_TexCoordVec4C1.xyz;
+
+	float sizeStart = a_PositionVec4.w;
+	vec4 colorStart = a_Color;
+
+#if THICKFORMAT
+	vec3 CPEnd = endPosition - a_TexCoordVec4C2.xyz;
+	float sizeEnd = a_TexCoordVec4C2.w;
+	vec4 colorEnd = a_TexCoordVec4C3;
+	vec2 uvs = a_TexCoordC4.xy;
+#else
+	vec3 CPEnd = endPosition - a_TexCoordVec3C2.xyz;
+	float sizeEnd = sizeStart;
+	vec4 colorEnd = a_Color;
+	vec2 uvs = a_TexCoordC3.xy;
+#endif
+
+	vec3 eyeDirection = mul(g_OrientationForward, CAST3X3(g_ModelMatrixInverse));
+	vec3 trailDelta = endPosition - startPosition;
+
+	vec3 trailRightStart = cross(eyeDirection, trailDelta + CPStart);
+	trailRightStart = normalize(trailRightStart) * sizeStart;
+
+	vec3 trailRightEnd = cross(eyeDirection, trailDelta - CPEnd);
+	trailRightEnd = normalize(trailRightEnd) * sizeEnd;
+
+	vec4 color = mix(colorStart, colorEnd, uvs.y);
+	vec3 position = mix(startPosition, endPosition, uvs.y);
+	vec3 right = mix(trailRightStart, trailRightEnd, uvs.y);
+	right *= uvs.x * 2.0 - 1.0;
+
+	gl_Position = mul(vec4(position + right, 1.0), g_ModelViewProjectionMatrix);
+
+	float usableLength = in_ParticleTrailLength - 1;
+	
+#if THICKFORMAT
+	float uvMinimum = 1.0 - (in_ParticleTrailPosition) / usableLength;
+	float uvDelta = -1.0 / usableLength;
+#else
+	// Still spawning new elements, extend to physical end of trail
+	if (in_ParticleTrailLength < in_SegmentMaxCount)
+	{
+		usableLength += in_SegmentUVTimeOffset;
+	}
+	
+	float uvMinimum = (in_ParticleTrailPosition - (1.0 - in_SegmentUVTimeOffset)) / usableLength;
+	float uvDelta = 1.0 / usableLength;
+	
+	// The first element is shorter based on the history timer and always starts and UV 0
+	if (in_ParticleTrailPosition < 0.5)
+	{
+		uvMinimum = 0.0;
+		uvDelta = in_SegmentUVTimeOffset / usableLength;
+	}
+#endif
+
+	v_TexCoord.xy = uvs.xy;
+	v_TexCoord.y = mix(uvMinimum, uvMinimum + uvDelta, uvs.y);
+	
+#if FOG_DIST || FOG_HEIGHT
+	vec3 worldPos = mul(vec4(startPosition, 1.0), g_ModelMatrix).xyz;
+	v_ViewDir.xyz = g_EyePosition - worldPos.xyz;
+	v_ViewDir.w = worldPos.y;
+#endif
+
+	v_Color = color;
+}
+
+#endif