72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
#include "raylib.h"
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#include <stdlib.h>
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#include <math.h>
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#define NUM_POINTS 1000
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float randFloat()
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{
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return (float)rand() / RAND_MAX;
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}
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static Mesh GenMeshCustom(void)
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{
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Mesh mesh = {
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.triangleCount = 1,
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.vertexCount = NUM_POINTS,
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.vertices = (float *)MemAlloc(NUM_POINTS * 3 * sizeof(float)),
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};
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// https://en.wikipedia.org/wiki/Spherical_coordinate_system
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for (int i = 0; i < NUM_POINTS; i++) {
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float theta = PI * randFloat();
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float phi = 2 * PI * randFloat();
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float r = randFloat();
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mesh.vertices[i * 3 + 0] = r * sin(theta) * cos(phi);
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mesh.vertices[i * 3 + 1] = r * sin(theta) * sin(phi);
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mesh.vertices[i * 3 + 2] = r * cos(theta);
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}
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// Upload mesh data from CPU (RAM) to GPU (VRAM) memory
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UploadMesh(&mesh, false);
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return mesh;
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}
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int main()
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{
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Camera camera = {
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.position = {3.0f, 3.0f, 3.0f},
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.target = {0.0f, 0.0f, 0.0f},
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.up = {0.0f, 1.0f, 0.0f},
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.fovy = 45.0f,
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.projection = CAMERA_PERSPECTIVE,
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};
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InitWindow(800, 600, "Point Rendering");
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Mesh mesh = GenMeshCustom();
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Model model = LoadModelFromMesh(mesh);
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Vector3 position = {0.0f, 0.0f, 0.0f};
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bool drawSphere = true;
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SetTargetFPS(60);
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while(!WindowShouldClose()) {
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UpdateCamera(&camera, CAMERA_ORBITAL);
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if (IsKeyPressed(KEY_SPACE)) drawSphere = !drawSphere;
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BeginDrawing();
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ClearBackground(BLACK);
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BeginMode3D(camera);
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DrawModelPoints(model, position, 1.0f, WHITE);
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if (drawSphere)
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DrawSphereWires(position, 1.0f, 10, 10, WHITE);
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EndMode3D();
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EndDrawing();
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}
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UnloadModel(model);
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CloseWindow();
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return 0;
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}
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