From 881f134f4d2fb4419d50382284e19b4f8ca4660e Mon Sep 17 00:00:00 2001 From: raysan5 Date: Mon, 17 Apr 2017 16:42:01 +0200 Subject: Review and recompile web examples --- docs/examples/src/models/models_mesh_picking.c | 195 +++++++++++++++++++++++++ 1 file changed, 195 insertions(+) create mode 100644 docs/examples/src/models/models_mesh_picking.c (limited to 'docs/examples/src/models') diff --git a/docs/examples/src/models/models_mesh_picking.c b/docs/examples/src/models/models_mesh_picking.c new file mode 100644 index 00000000..0b5247ec --- /dev/null +++ b/docs/examples/src/models/models_mesh_picking.c @@ -0,0 +1,195 @@ +/******************************************************************************************* +* +* raylib [models] example - Mesh picking in 3d mode, ground plane, triangle, mesh +* +* This example has been created using raylib 1.7 (www.raylib.com) +* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details) +* +* Copyright (c) 2015 Ramon Santamaria (@raysan5) +* Example contributed by Joel Davis (@joeld42) +* +********************************************************************************************/ + +#include "raylib.h" +#include "raymath.h" + +#define FLT_MAX 3.40282347E+38F // Maximum value of a float, defined in + +int main() +{ + // Initialization + //-------------------------------------------------------------------------------------- + int screenWidth = 800; + int screenHeight = 450; + + InitWindow(screenWidth, screenHeight, "raylib [models] example - mesh picking"); + + // Define the camera to look into our 3d world + Camera camera; + camera.position = (Vector3){ 10.0f, 8.0f, 10.0f }; // Camera position + camera.target = (Vector3){ 0.0f, 2.3f, 0.0f }; // Camera looking at point + camera.up = (Vector3){ 0.0f, 1.6f, 0.0f }; // Camera up vector (rotation towards target) + camera.fovy = 45.0f; // Camera field-of-view Y + + Ray ray; // Picking ray + + Model tower = LoadModel("resources/tower.obj"); // Load OBJ model + Texture2D texture = LoadTexture("resources/tower.png"); // Load model texture + tower.material.texDiffuse = texture; // Set model diffuse texture + + Vector3 towerPos = { 0.0f, 0.0f, 0.0f }; // Set model position + BoundingBox towerBBox = CalculateBoundingBox(tower.mesh); + bool hitMeshBBox = false; + bool hitTriangle = false; + + // Test triangle + Vector3 ta = (Vector3){ -25.0, 0.5, 0.0 }; + Vector3 tb = (Vector3){ -4.0, 2.5, 1.0 }; + Vector3 tc = (Vector3){ -8.0, 6.5, 0.0 }; + + Vector3 bary = { 0.0f, 0.0f, 0.0f }; + + SetCameraMode(camera, CAMERA_FREE); // Set a free camera mode + + SetTargetFPS(60); // Set our game to run at 60 frames-per-second + //-------------------------------------------------------------------------------------- + // Main game loop + while (!WindowShouldClose()) // Detect window close button or ESC key + { + // Update + //---------------------------------------------------------------------------------- + UpdateCamera(&camera); // Update camera + + // Display information about closest hit + RayHitInfo nearestHit; + char *hitObjectName = "None"; + nearestHit.distance = FLT_MAX; + nearestHit.hit = false; + Color cursorColor = WHITE; + + // Get ray and test against ground, triangle, and mesh + ray = GetMouseRay(GetMousePosition(), camera); + + // Check ray collision aginst ground plane + RayHitInfo groundHitInfo = GetCollisionRayGround(ray, 0.0f); + + if ((groundHitInfo.hit) && (groundHitInfo.distance < nearestHit.distance)) + { + nearestHit = groundHitInfo; + cursorColor = GREEN; + hitObjectName = "Ground"; + } + + // Check ray collision against test triangle + RayHitInfo triHitInfo = GetCollisionRayTriangle(ray, ta, tb, tc); + + if ((triHitInfo.hit) && (triHitInfo.distance < nearestHit.distance)) + { + nearestHit = triHitInfo; + cursorColor = PURPLE; + hitObjectName = "Triangle"; + + bary = VectorBarycenter(nearestHit.hitPosition, ta, tb, tc); + hitTriangle = true; + } + else hitTriangle = false; + + RayHitInfo meshHitInfo; + + // Check ray collision against bounding box first, before trying the full ray-mesh test + if (CheckCollisionRayBox(ray, towerBBox)) + { + hitMeshBBox = true; + + // Check ray collision against mesh + meshHitInfo = GetCollisionRayMesh(ray, &tower.mesh); + + if ((meshHitInfo.hit) && (meshHitInfo.distance < nearestHit.distance)) + { + nearestHit = meshHitInfo; + cursorColor = ORANGE; + hitObjectName = "Mesh"; + } + + } hitMeshBBox = false; + //---------------------------------------------------------------------------------- + + // Draw + //---------------------------------------------------------------------------------- + BeginDrawing(); + + ClearBackground(RAYWHITE); + + Begin3dMode(camera); + + // Draw the tower + DrawModel(tower, towerPos, 1.0, WHITE); + + // Draw the test triangle + DrawLine3D(ta, tb, PURPLE); + DrawLine3D(tb, tc, PURPLE); + DrawLine3D(tc, ta, PURPLE); + + // Draw the mesh bbox if we hit it + if (hitMeshBBox) DrawBoundingBox(towerBBox, LIME); + + // If we hit something, draw the cursor at the hit point + if (nearestHit.hit) + { + DrawCube(nearestHit.hitPosition, 0.3, 0.3, 0.3, cursorColor); + DrawCubeWires(nearestHit.hitPosition, 0.3, 0.3, 0.3, RED); + + Vector3 normalEnd; + normalEnd.x = nearestHit.hitPosition.x + nearestHit.hitNormal.x; + normalEnd.y = nearestHit.hitPosition.y + nearestHit.hitNormal.y; + normalEnd.z = nearestHit.hitPosition.z + nearestHit.hitNormal.z; + + DrawLine3D(nearestHit.hitPosition, normalEnd, RED); + } + + DrawRay(ray, MAROON); + + DrawGrid(100, 1.0f); + + End3dMode(); + + // Draw some debug GUI text + DrawText(FormatText("Hit Object: %s", hitObjectName), 10, 50, 10, BLACK); + + if (nearestHit.hit) + { + int ypos = 70; + + DrawText(FormatText("Distance: %3.2f", nearestHit.distance), 10, ypos, 10, BLACK); + + DrawText(FormatText("Hit Pos: %3.2f %3.2f %3.2f", + nearestHit.hitPosition.x, + nearestHit.hitPosition.y, + nearestHit.hitPosition.z), 10, ypos + 15, 10, BLACK); + + DrawText(FormatText("Hit Norm: %3.2f %3.2f %3.2f", + nearestHit.hitNormal.x, + nearestHit.hitNormal.y, + nearestHit.hitNormal.z), 10, ypos + 30, 10, BLACK); + + if (hitTriangle) DrawText(FormatText("Barycenter: %3.2f %3.2f %3.2f", bary.x, bary.y, bary.z), 10, ypos + 45, 10, BLACK); + } + + DrawText("Use Mouse to Move Camera", 10, 430, 10, GRAY); + + DrawFPS(10, 10); + + EndDrawing(); + //---------------------------------------------------------------------------------- + } + + // De-Initialization + //-------------------------------------------------------------------------------------- + UnloadModel(tower); // Unload model + UnloadTexture(texture); // Unload texture + + CloseWindow(); // Close window and OpenGL context + //-------------------------------------------------------------------------------------- + + return 0; +} \ No newline at end of file -- cgit v1.2.3