125 lines
3.4 KiB
GLSL
125 lines
3.4 KiB
GLSL
/* clang-format off */
|
|
#[modes]
|
|
|
|
mode_default =
|
|
|
|
#[specializations]
|
|
|
|
MODE_3D = false
|
|
|
|
#[vertex]
|
|
|
|
#include "stdlib_inc.glsl"
|
|
|
|
// ParticleData
|
|
layout(location = 0) in highp vec4 color;
|
|
layout(location = 1) in highp vec4 velocity_flags;
|
|
layout(location = 2) in highp vec4 custom;
|
|
layout(location = 3) in highp vec4 xform_1;
|
|
layout(location = 4) in highp vec4 xform_2;
|
|
#ifdef MODE_3D
|
|
layout(location = 5) in highp vec4 xform_3;
|
|
#endif
|
|
|
|
/* clang-format on */
|
|
out highp vec4 out_xform_1; //tfb:
|
|
out highp vec4 out_xform_2; //tfb:
|
|
#ifdef MODE_3D
|
|
out highp vec4 out_xform_3; //tfb:MODE_3D
|
|
#endif
|
|
flat out highp uvec4 instance_color_custom_data; //tfb:
|
|
|
|
uniform lowp vec3 sort_direction;
|
|
uniform highp float frame_remainder;
|
|
|
|
uniform highp vec3 align_up;
|
|
uniform highp uint align_mode;
|
|
|
|
uniform highp mat4 inv_emission_transform;
|
|
|
|
#define TRANSFORM_ALIGN_DISABLED uint(0)
|
|
#define TRANSFORM_ALIGN_Z_BILLBOARD uint(1)
|
|
#define TRANSFORM_ALIGN_Y_TO_VELOCITY uint(2)
|
|
#define TRANSFORM_ALIGN_Z_BILLBOARD_Y_TO_VELOCITY uint(3)
|
|
|
|
#define PARTICLE_FLAG_ACTIVE uint(1)
|
|
|
|
#define FLT_MAX float(3.402823466e+38)
|
|
|
|
void main() {
|
|
// Set scale to zero and translate to -INF so particle will be invisible
|
|
// even for materials that ignore rotation/scale (i.e. billboards).
|
|
mat4 txform = mat4(vec4(0.0), vec4(0.0), vec4(0.0), vec4(-FLT_MAX, -FLT_MAX, -FLT_MAX, 0.0));
|
|
if (bool(floatBitsToUint(velocity_flags.w) & PARTICLE_FLAG_ACTIVE)) {
|
|
#ifdef MODE_3D
|
|
txform = transpose(mat4(xform_1, xform_2, xform_3, vec4(0.0, 0.0, 0.0, 1.0)));
|
|
#else
|
|
txform = transpose(mat4(xform_1, xform_2, vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0)));
|
|
#endif
|
|
|
|
switch (align_mode) {
|
|
case TRANSFORM_ALIGN_DISABLED: {
|
|
} break; //nothing
|
|
case TRANSFORM_ALIGN_Z_BILLBOARD: {
|
|
mat3 local = mat3(normalize(cross(align_up, sort_direction)), align_up, sort_direction);
|
|
local = local * mat3(txform);
|
|
txform[0].xyz = local[0];
|
|
txform[1].xyz = local[1];
|
|
txform[2].xyz = local[2];
|
|
|
|
} break;
|
|
case TRANSFORM_ALIGN_Y_TO_VELOCITY: {
|
|
vec3 v = velocity_flags.xyz;
|
|
float s = (length(txform[0]) + length(txform[1]) + length(txform[2])) / 3.0;
|
|
if (length(v) > 0.0) {
|
|
txform[1].xyz = normalize(v);
|
|
} else {
|
|
txform[1].xyz = normalize(txform[1].xyz);
|
|
}
|
|
|
|
txform[0].xyz = normalize(cross(txform[1].xyz, txform[2].xyz));
|
|
txform[2].xyz = vec3(0.0, 0.0, 1.0) * s;
|
|
txform[0].xyz *= s;
|
|
txform[1].xyz *= s;
|
|
} break;
|
|
case TRANSFORM_ALIGN_Z_BILLBOARD_Y_TO_VELOCITY: {
|
|
vec3 sv = velocity_flags.xyz - sort_direction * dot(sort_direction, velocity_flags.xyz); //screen velocity
|
|
float s = (length(txform[0]) + length(txform[1]) + length(txform[2])) / 3.0;
|
|
|
|
if (length(sv) == 0.0) {
|
|
sv = align_up;
|
|
}
|
|
|
|
sv = normalize(sv);
|
|
|
|
txform[0].xyz = normalize(cross(sv, sort_direction)) * s;
|
|
txform[1].xyz = sv * s;
|
|
txform[2].xyz = sort_direction * s;
|
|
|
|
} break;
|
|
}
|
|
|
|
txform[3].xyz += velocity_flags.xyz * frame_remainder;
|
|
|
|
#ifndef MODE_3D
|
|
// In global mode, bring 2D particles to local coordinates
|
|
// as they will be drawn with the node position as origin.
|
|
txform = inv_emission_transform * txform;
|
|
#endif
|
|
}
|
|
txform = transpose(txform);
|
|
|
|
instance_color_custom_data = uvec4(packHalf2x16(color.xy), packHalf2x16(color.zw), packHalf2x16(custom.xy), packHalf2x16(custom.zw));
|
|
out_xform_1 = txform[0];
|
|
out_xform_2 = txform[1];
|
|
#ifdef MODE_3D
|
|
out_xform_3 = txform[2];
|
|
#endif
|
|
}
|
|
|
|
/* clang-format off */
|
|
#[fragment]
|
|
|
|
void main() {
|
|
}
|
|
/* clang-format on */
|