feature/imgui-sdl
Last change
on this file since 52a02e6 was 52a02e6, checked in by Dmitry Portnoy <dmitry.portnoy@…>, 4 years ago |
Add a primitive topology parameter to the GraphicsPipeline_Vulkan constructor
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Property mode
set to
100644
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File size:
1.2 KB
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1 | #version 410 core
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2 |
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3 | #define MAX_NUM_OBJECTS 1024
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4 |
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5 | uniform mat4 view, proj;
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6 | uniform float cur_time;
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7 |
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8 | uniform float explosion_start_time[1012];
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9 |
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10 | layout (std140) uniform models {
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11 | mat4 model_mats[MAX_NUM_OBJECTS];
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12 | };
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13 |
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14 | layout (location = 0) in vec3 v_i; // initial velocity
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15 | layout (location = 1) in float start_time;
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16 | layout(location = 2) in uint ubo_index;
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17 |
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18 | out float opacity;
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19 |
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20 | void main() {
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21 | float duration = 0.5;
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22 | float t = cur_time - explosion_start_time[ubo_index] - start_time;
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23 |
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24 | if (t < 0.0) {
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25 | opacity = 0.0;
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26 | } else {
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27 | // Need to find out the last time this particle was at the origin
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28 | // If that is greater than the duration, hide the particle
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29 | float cur = floor(t / duration);
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30 | float end = floor((duration - start_time) / duration);
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31 | if (cur > end) {
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32 | opacity = 0.0;
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33 | } else {
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34 | opacity = 1.0 - (t / duration);
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35 | }
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36 | }
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37 |
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38 | // this is the center of the explosion
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39 | vec3 p = vec3(0.0, 0.0, 0.0);
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40 |
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41 | // allow time to loop around so particle emitter keeps going
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42 | p += normalize(v_i) * mod(t, duration) / duration * 0.3;
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43 |
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44 | gl_Position = proj * view * model_mats[ubo_index] * vec4(p, 1.0);
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45 | gl_PointSize = 15.0; // size in pixels
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46 | }
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