First commit (very unfinished)
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milkwx3
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#include "common.hpp"
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#include <list>
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#include <rlgl.h>
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std::list<Particle> particles;
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extern Camera3D camera;
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extern Texture2D terrain;
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static void DrawParticle(Particle particle, Color color)
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{
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Vector3 position = particle.position;
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float x = position.x;
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float y = position.y;
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float z = position.z;
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float width = 0.25f;
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float height = width;
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float length = height;
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UVCorners corners = GetUVTex(particle.data[0], width, width, width, width);
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UVCorners front = corners;
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UVCorners back = corners;
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UVCorners top = corners;
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UVCorners bottom = corners;
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UVCorners left = corners;
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UVCorners right = corners;
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// Set desired texture to be enabled while drawing following vertex data
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rlSetTexture(terrain.id);
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rlBegin(RL_QUADS);
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rlColor4ub(color.r, color.g, color.b, color.a);
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// Front Face
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rlNormal3f(0.0f, 0.0f, 1.0f); // Normal Pointing Towards Viewer
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rlTexCoord2f(front.corner0.x, front.corner0.y); rlVertex3f(x - width/2, y - height/2, z + length/2); // Bottom Left Of The Texture and Quad
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rlTexCoord2f(front.corner1.x, front.corner1.y); rlVertex3f(x + width/2, y - height/2, z + length/2); // Bottom Right Of The Texture and Quad
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rlTexCoord2f(front.corner2.x, front.corner2.y); rlVertex3f(x + width/2, y + height/2, z + length/2); // Top Right Of The Texture and Quad
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rlTexCoord2f(front.corner3.x, front.corner3.y); rlVertex3f(x - width/2, y + height/2, z + length/2); // Top Left Of The Texture and Quad
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// Back Face
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rlNormal3f(0.0f, 0.0f, - 1.0f); // Normal Pointing Away From Viewer
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rlTexCoord2f(back.corner1.x, back.corner1.y); rlVertex3f(x - width/2, y - height/2, z - length/2); // Bottom Right Of The Texture and Quad
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rlTexCoord2f(back.corner2.x, back.corner2.y); rlVertex3f(x - width/2, y + height/2, z - length/2); // Top Right Of The Texture and Quad
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rlTexCoord2f(back.corner3.x, back.corner3.y); rlVertex3f(x + width/2, y + height/2, z - length/2); // Top Left Of The Texture and Quad
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rlTexCoord2f(back.corner0.x, back.corner0.y); rlVertex3f(x + width/2, y - height/2, z - length/2); // Bottom Left Of The Texture and Quad
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// Top Face
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rlNormal3f(0.0f, 1.0f, 0.0f); // Normal Pointing Up
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rlTexCoord2f(top.corner3.x, top.corner3.y); rlVertex3f(x - width/2, y + height/2, z - length/2); // Top Left Of The Texture and Quad
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rlTexCoord2f(top.corner0.x, top.corner0.y); rlVertex3f(x - width/2, y + height/2, z + length/2); // Bottom Left Of The Texture and Quad
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rlTexCoord2f(top.corner1.x, top.corner1.y); rlVertex3f(x + width/2, y + height/2, z + length/2); // Bottom Right Of The Texture and Quad
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rlTexCoord2f(top.corner2.x, top.corner2.y); rlVertex3f(x + width/2, y + height/2, z - length/2); // Top Right Of The Texture and Quad
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// Bottom Face
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rlNormal3f(0.0f, - 1.0f, 0.0f); // Normal Pointing Down
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rlTexCoord2f(bottom.corner2.x, bottom.corner2.y); rlVertex3f(x - width/2, y - height/2, z - length/2); // Top Right Of The Texture and Quad
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rlTexCoord2f(bottom.corner3.x, bottom.corner3.y); rlVertex3f(x + width/2, y - height/2, z - length/2); // Top Left Of The Texture and Quad
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rlTexCoord2f(bottom.corner0.x, bottom.corner0.y); rlVertex3f(x + width/2, y - height/2, z + length/2); // Bottom Left Of The Texture and Quad
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rlTexCoord2f(bottom.corner1.x, bottom.corner1.y); rlVertex3f(x - width/2, y - height/2, z + length/2); // Bottom Right Of The Texture and Quad
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// Right face
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rlNormal3f(1.0f, 0.0f, 0.0f); // Normal Pointing Right
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rlTexCoord2f(right.corner1.x, right.corner1.y); rlVertex3f(x + width/2, y - height/2, z - length/2); // Bottom Right Of The Texture and Quad
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rlTexCoord2f(right.corner2.x, right.corner2.y); rlVertex3f(x + width/2, y + height/2, z - length/2); // Top Right Of The Texture and Quad
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rlTexCoord2f(right.corner3.x, right.corner3.y); rlVertex3f(x + width/2, y + height/2, z + length/2); // Top Left Of The Texture and Quad
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rlTexCoord2f(right.corner0.x, right.corner0.y); rlVertex3f(x + width/2, y - height/2, z + length/2); // Bottom Left Of The Texture and Quad
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// Left Face
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rlNormal3f( - 1.0f, 0.0f, 0.0f); // Normal Pointing Left
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rlTexCoord2f(left.corner0.x, left.corner0.y); rlVertex3f(x - width/2, y - height/2, z - length/2); // Bottom Left Of The Texture and Quad
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rlTexCoord2f(left.corner1.x, left.corner1.y); rlVertex3f(x - width/2, y - height/2, z + length/2); // Bottom Right Of The Texture and Quad
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rlTexCoord2f(left.corner2.x, left.corner2.y); rlVertex3f(x - width/2, y + height/2, z + length/2); // Top Right Of The Texture and Quad
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rlTexCoord2f(left.corner3.x, left.corner3.y); rlVertex3f(x - width/2, y + height/2, z - length/2); // Top Left Of The Texture and Quad
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rlEnd();
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rlSetTexture(0);
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}
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void ParticlesUpdate(float dt, Chunk world[]) {
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particles.remove_if([](Particle x) { return x.lifetime > 200; });
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for (Particle &part : particles)
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{
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part.lifetime++;
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if(part.physicsType == Phys_Falling) {
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Vector3 velocityTgt = Vector3Clamp(Vector3Add(part.velocity, {0, -dt * 9.8f, 0}), {-30.0f, -30.0f, 0-30.0f}, {30.0f, 30.0f, 30.0f});
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Vector3 tgt = Vector3Add(part.position, Vector3Scale(velocityTgt, dt));
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Vector3 vis = Vector3Add(tgt, {0.5f, 0.4f, 0.5f});
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Vector3 final = part.position;
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if(!GetBlock(world, (int)vis.x, (int)final.y, (int)final.z)) {
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final.x = tgt.x;
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}
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if(!GetBlock(world, (int)final.x, (int)vis.y, (int)final.z)) {
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final.y = tgt.y;
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}
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else {
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velocityTgt.y = 0;
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}
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if(!GetBlock(world, (int)final.x, (int)final.y, (int)vis.z)) {
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final.z = tgt.z;
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}
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for (Particle &part2 : particles)
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{
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if(Vector3DistanceSqr(part.position, part2.position) < 0.25f*0.25f) {
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Vector3 force = Vector3Normalize(Vector3Subtract(part.position, part2.position)) * dt * 25;
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part.velocity += force;
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part2.velocity -= force;
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}
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}
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part.position = final;
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part.velocity = velocityTgt;
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}
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}
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}
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void ParticlesDraw() {
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for (Particle part : particles)
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{
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DrawParticle(part, WHITE);
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}
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}
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void AddParticle(Particle part) {
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particles.push_back(part);
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}
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Particle NewParticle(Vector3 position) {
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Particle part;
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part.physicsType = Phys_Falling;
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part.position = position;
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part.texture = terrain;
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return part;
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}
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