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https://gitlab.com/veloren/veloren.git
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136 lines
3.0 KiB
GLSL
136 lines
3.0 KiB
GLSL
#version 330 core
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#include <globals.glsl>
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#include <srgb.glsl>
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#include <random.glsl>
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in vec3 v_pos;
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in uint v_col;
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in uint v_norm_ao;
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in vec3 inst_pos;
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in float inst_time;
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in float inst_entropy;
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in int inst_mode;
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out vec3 f_pos;
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flat out vec3 f_norm;
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out vec3 f_col;
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out float f_ao;
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out float f_light;
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const float SCALE = 1.0 / 11.0;
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// Φ = Golden Ratio
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float PHI = 1.61803398874989484820459;
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float gold_noise(in vec2 xy, in float seed){
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return fract(tan(distance(xy * PHI, xy) * seed) * xy.x);
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}
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// Modes
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const int SMOKE = 0;
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const int FIRE = 1;
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const int GUN_POWDER_SPARK = 2;
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// meters per second
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const float earth_gravity = 9.807;
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mat4 translate(vec3 vec){
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return mat4(
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vec4(1.0, 0.0, 0.0, 0.0),
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vec4(0.0, 1.0, 0.0, 0.0),
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vec4(0.0, 0.0, 1.0, 0.0),
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vec4(vec.x, vec.y, vec.z, 1.0)
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);
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}
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struct Attr {
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vec3 offs;
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float scale;
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vec3 col;
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};
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float lifetime = tick.x - inst_time;
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vec3 linear_motion(vec3 init_offs, vec3 vel) {
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return init_offs + vel * lifetime;
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}
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vec3 grav_vel(float grav) {
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return vec3(0, 0, -grav * lifetime);
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}
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float exp_scale(float factor) {
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return 1 / (1 - lifetime * factor);
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}
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void main() {
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mat4 inst_mat = translate(inst_pos);
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float rand0 = hash(vec4(inst_entropy + 0));
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float rand1 = hash(vec4(inst_entropy + 1));
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float rand2 = hash(vec4(inst_entropy + 2));
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float rand3 = hash(vec4(inst_entropy + 3));
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float rand4 = hash(vec4(inst_entropy + 4));
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float rand5 = hash(vec4(inst_entropy + 5));
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float rand6 = hash(vec4(inst_entropy + 6));
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float rand7 = hash(vec4(inst_entropy + 7));
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Attr attr;
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if (inst_mode == SMOKE) {
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attr = Attr(
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linear_motion(
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vec3(rand0 * 0.25, rand1 * 0.25, 1.7 + rand5),
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vec3(rand2 * 0.2, rand3 * 0.2, 1.0 + rand4 * 0.5)// + vec3(sin(lifetime), sin(lifetime + 1.5), sin(lifetime * 4) * 0.25)
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),
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exp_scale(-0.2),
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vec3(1)
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);
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} else if (inst_mode == FIRE) {
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attr = Attr(
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linear_motion(
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vec3(rand0 * 0.25, rand1 * 0.25, 0.3),
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vec3(rand2 * 0.1, rand3 * 0.1, 2.0 + rand4 * 1.0)
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),
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1.0,
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vec3(2, rand5 + 2, 0)
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);
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} else if (inst_mode == GUN_POWDER_SPARK) {
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attr = Attr(
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linear_motion(
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vec3(rand0, rand1, rand3) * 0.3,
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vec3(rand4, rand5, rand6) * 2.0 + grav_vel(earth_gravity)
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),
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1.0,
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vec3(3.5, 3 + rand7, 0)
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);
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} else {
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attr = Attr(
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linear_motion(
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vec3(rand0 * 0.25, rand1 * 0.25, 1.7 + rand5),
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vec3(rand2 * 0.1, rand3 * 0.1, 1.0 + rand4 * 0.5)
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),
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exp_scale(-0.2),
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vec3(1)
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);
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}
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f_pos = (inst_mat * vec4(v_pos * attr.scale * SCALE + attr.offs, 1)).xyz;
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// First 3 normals are negative, next 3 are positive
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vec3 normals[6] = vec3[](vec3(-1,0,0), vec3(1,0,0), vec3(0,-1,0), vec3(0,1,0), vec3(0,0,-1), vec3(0,0,1));
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f_norm = (inst_mat * vec4(normals[(v_norm_ao >> 0) & 0x7u], 0)).xyz;
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vec3 col = vec3((uvec3(v_col) >> uvec3(0, 8, 16)) & uvec3(0xFFu)) / 255.0;
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f_col = srgb_to_linear(col) * srgb_to_linear(attr.col);
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f_ao = float((v_norm_ao >> 3) & 0x3u) / 4.0;
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f_light = 1.0;
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gl_Position =
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all_mat *
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vec4(f_pos, 1);
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gl_Position.z = -1000.0 / (gl_Position.z + 10000.0);
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}
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