mirror of
https://github.com/raysan5/raylib.git
synced 2025-10-26 12:27:01 +00:00
Oculus Rift example with rlgl standalone
This commit is contained in:
raysan5
393
examples/rlgl_oculus_rift.c
Normal file
393
examples/rlgl_oculus_rift.c
Normal file
@@ -0,0 +1,393 @@
|
||||
/*******************************************************************************************
|
||||
*
|
||||
* raylib [rlgl] example - Oculus minimum sample
|
||||
*
|
||||
* NOTE: This example requires OpenGL 3.3 or ES2 versions for shaders support,
|
||||
* OpenGL 1.1 does not support shaders but it can also be used.
|
||||
*
|
||||
* Compile rlgl module using:
|
||||
* gcc -c rlgl.c -Wall -std=c99 -DRLGL_STANDALONE -DRAYMATH_IMPLEMENTATION -DGRAPHICS_API_OPENGL_33 -DRLGL_OCULUS_SUPPORT
|
||||
*
|
||||
* NOTE 1: rlgl module requires the following header-only files:
|
||||
* external/glad.h - OpenGL extensions loader (stripped to only required extensions)
|
||||
* shader_standard.h - Standard shader for materials and lighting
|
||||
* shader_distortion.h - Distortion shader for VR
|
||||
* raymath.h - Vector and matrix math functions
|
||||
*
|
||||
* NOTE 2: rlgl requires LibOVR (Oculus PC SDK) to support Oculus Rift CV1
|
||||
*
|
||||
* Compile example using:
|
||||
* gcc -o rlgl_oculus_rift.exe rlgl_oculus_rift.c rlgl.o -L. -lLibOVRRT32_1 -lglfw3 -lopengl32 -lgdi32 -std=c99
|
||||
*
|
||||
* NOTE: Example must be linked against LibOVRRT32_1.dll that comes with Oculus Rift runtime.
|
||||
*
|
||||
* This example has been created using raylib 1.5 (www.raylib.com)
|
||||
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
|
||||
*
|
||||
* Copyright (c) 2015 Ramon Santamaria (@raysan5)
|
||||
*
|
||||
********************************************************************************************/
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdarg.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <math.h>
|
||||
|
||||
#include <GLFW/glfw3.h> // Windows/Context and inputs management
|
||||
|
||||
#define RLGL_STANDALONE
|
||||
#include "rlgl.h" // rlgl library: OpenGL 1.1 immediate-mode style coding
|
||||
|
||||
#define RED (Color){ 230, 41, 55, 255 } // Red
|
||||
#define RAYWHITE (Color){ 245, 245, 245, 255 } // My own White (raylib logo)
|
||||
#define DARKGRAY (Color){ 80, 80, 80, 255 } // Dark Gray
|
||||
|
||||
//----------------------------------------------------------------------------------
|
||||
// Module specific Functions Declaration
|
||||
//----------------------------------------------------------------------------------
|
||||
static void ErrorCallback(int error, const char* description);
|
||||
static void KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods);
|
||||
|
||||
// Drawing functions (uses rlgl functionality)
|
||||
static void DrawGrid(int slices, float spacing);
|
||||
static void DrawCube(Vector3 position, float width, float height, float length, Color color);
|
||||
static void DrawCubeWires(Vector3 position, float width, float height, float length, Color color);
|
||||
static void DrawRectangleV(Vector2 position, Vector2 size, Color color);
|
||||
|
||||
//----------------------------------------------------------------------------------
|
||||
// Main Entry point
|
||||
//----------------------------------------------------------------------------------
|
||||
int main(void)
|
||||
{
|
||||
// Initialization
|
||||
//--------------------------------------------------------------------------------------
|
||||
int screenWidth = 1080; // Mirror screen width (set to hmdDesc.Resolution.w/2)
|
||||
int screenHeight = 600; // Mirror screen height (set to hmdDesc.Resolution.h/2)
|
||||
|
||||
// NOTE: Mirror screen size can be set to any desired resolution!
|
||||
|
||||
// GLFW3 Initialization + OpenGL 3.3 Context + Extensions
|
||||
//--------------------------------------------------------
|
||||
glfwSetErrorCallback(ErrorCallback);
|
||||
|
||||
if (!glfwInit())
|
||||
{
|
||||
TraceLog(WARNING, "GLFW3: Can not initialize GLFW");
|
||||
return 1;
|
||||
}
|
||||
else TraceLog(INFO, "GLFW3: GLFW initialized successfully");
|
||||
|
||||
glfwWindowHint(GLFW_SAMPLES, 4);
|
||||
glfwWindowHint(GLFW_DEPTH_BITS, 16);
|
||||
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
|
||||
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
|
||||
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
|
||||
glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE);
|
||||
|
||||
GLFWwindow *window = glfwCreateWindow(screenWidth, screenHeight, "rlgl oculus rift", NULL, NULL);
|
||||
|
||||
if (!window)
|
||||
{
|
||||
glfwTerminate();
|
||||
return 2;
|
||||
}
|
||||
else TraceLog(INFO, "GLFW3: Window created successfully");
|
||||
|
||||
glfwSetKeyCallback(window, KeyCallback);
|
||||
|
||||
glfwMakeContextCurrent(window);
|
||||
glfwSwapInterval(0);
|
||||
|
||||
// Load OpenGL 3.3 supported extensions
|
||||
rlglLoadExtensions(glfwGetProcAddress);
|
||||
//--------------------------------------------------------
|
||||
|
||||
// Initialize OpenGL context (states and resources)
|
||||
rlglInit(screenWidth, screenHeight);
|
||||
|
||||
rlClearColor(245, 245, 245, 255); // Define clear color
|
||||
rlEnableDepthTest(); // Enable DEPTH_TEST for 3D
|
||||
|
||||
// Define custom camera to initialize projection and view matrices
|
||||
Camera camera;
|
||||
camera.position = (Vector3){ 5.0f, 5.0f, 5.0f }; // Camera position
|
||||
camera.target = (Vector3){ 0.0f, 0.0f, 0.0f }; // Camera looking at point
|
||||
camera.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera up vector (rotation towards target)
|
||||
camera.fovy = 45.0f; // Camera field-of-view Y
|
||||
|
||||
// Initialize viewport and internal projection/modelview matrices
|
||||
rlViewport(0, 0, screenWidth, screenHeight);
|
||||
rlMatrixMode(RL_PROJECTION); // Switch to PROJECTION matrix
|
||||
rlLoadIdentity(); // Reset current matrix (PROJECTION)
|
||||
|
||||
// Setup perspective projection
|
||||
float aspect = (float)screenWidth/(float)screenHeight;
|
||||
double top = 0.01*tan(camera.fovy*PI/360.0);
|
||||
double right = top*aspect;
|
||||
rlFrustum(-right, right, -top, top, 0.01, 1000.0);
|
||||
|
||||
rlMatrixMode(RL_MODELVIEW); // Switch back to MODELVIEW matrix
|
||||
rlLoadIdentity(); // Reset current matrix (MODELVIEW)
|
||||
|
||||
// Setup Camera view
|
||||
Matrix cameraView = MatrixLookAt(camera.position, camera.target, camera.up);
|
||||
rlMultMatrixf(MatrixToFloat(cameraView)); // Multiply MODELVIEW matrix by view matrix (camera)
|
||||
|
||||
InitOculusDevice(); // Initialize Oculus Rift CV1
|
||||
|
||||
Vector3 cubePosition = { 0.0f, 0.0f, 0.0f };
|
||||
//--------------------------------------------------------------------------------------
|
||||
|
||||
// Main game loop
|
||||
while (!glfwWindowShouldClose(window))
|
||||
{
|
||||
// Update
|
||||
//----------------------------------------------------------------------------------
|
||||
UpdateOculusTracking();
|
||||
//----------------------------------------------------------------------------------
|
||||
|
||||
// Draw
|
||||
//----------------------------------------------------------------------------------
|
||||
BeginOculusDrawing();
|
||||
|
||||
rlClearScreenBuffers(); // Clear current framebuffer(s)
|
||||
|
||||
DrawCube(cubePosition, 2.0f, 2.0f, 2.0f, RED);
|
||||
DrawCubeWires(cubePosition, 2.0f, 2.0f, 2.0f, RAYWHITE);
|
||||
DrawGrid(10, 1.0f);
|
||||
|
||||
// NOTE: Internal buffers drawing (3D data)
|
||||
rlglDraw();
|
||||
|
||||
EndOculusDrawing();
|
||||
|
||||
glfwSwapBuffers(window);
|
||||
glfwPollEvents();
|
||||
//----------------------------------------------------------------------------------
|
||||
}
|
||||
|
||||
// De-Initialization
|
||||
//--------------------------------------------------------------------------------------
|
||||
CloseOculusDevice(); // Close Oculus device and clear resources
|
||||
|
||||
rlglClose(); // Unload rlgl internal buffers and default shader/texture
|
||||
|
||||
glfwDestroyWindow(window); // Close window
|
||||
glfwTerminate(); // Free GLFW3 resources
|
||||
//--------------------------------------------------------------------------------------
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------------------------
|
||||
// Module specific Functions Definitions
|
||||
//----------------------------------------------------------------------------------
|
||||
|
||||
// GLFW3: Error callback
|
||||
static void ErrorCallback(int error, const char* description)
|
||||
{
|
||||
TraceLog(ERROR, description);
|
||||
}
|
||||
|
||||
// GLFW3: Keyboard callback
|
||||
static void KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
|
||||
{
|
||||
if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
|
||||
{
|
||||
glfwSetWindowShouldClose(window, GL_TRUE);
|
||||
}
|
||||
}
|
||||
|
||||
// Draw rectangle using rlgl OpenGL 1.1 style coding (translated to OpenGL 3.3 internally)
|
||||
static void DrawRectangleV(Vector2 position, Vector2 size, Color color)
|
||||
{
|
||||
rlBegin(RL_TRIANGLES);
|
||||
rlColor4ub(color.r, color.g, color.b, color.a);
|
||||
|
||||
rlVertex2i(position.x, position.y);
|
||||
rlVertex2i(position.x, position.y + size.y);
|
||||
rlVertex2i(position.x + size.x, position.y + size.y);
|
||||
|
||||
rlVertex2i(position.x, position.y);
|
||||
rlVertex2i(position.x + size.x, position.y + size.y);
|
||||
rlVertex2i(position.x + size.x, position.y);
|
||||
rlEnd();
|
||||
}
|
||||
|
||||
// Draw a grid centered at (0, 0, 0)
|
||||
static void DrawGrid(int slices, float spacing)
|
||||
{
|
||||
int halfSlices = slices / 2;
|
||||
|
||||
rlBegin(RL_LINES);
|
||||
for(int i = -halfSlices; i <= halfSlices; i++)
|
||||
{
|
||||
if (i == 0)
|
||||
{
|
||||
rlColor3f(0.5f, 0.5f, 0.5f);
|
||||
rlColor3f(0.5f, 0.5f, 0.5f);
|
||||
rlColor3f(0.5f, 0.5f, 0.5f);
|
||||
rlColor3f(0.5f, 0.5f, 0.5f);
|
||||
}
|
||||
else
|
||||
{
|
||||
rlColor3f(0.75f, 0.75f, 0.75f);
|
||||
rlColor3f(0.75f, 0.75f, 0.75f);
|
||||
rlColor3f(0.75f, 0.75f, 0.75f);
|
||||
rlColor3f(0.75f, 0.75f, 0.75f);
|
||||
}
|
||||
|
||||
rlVertex3f((float)i*spacing, 0.0f, (float)-halfSlices*spacing);
|
||||
rlVertex3f((float)i*spacing, 0.0f, (float)halfSlices*spacing);
|
||||
|
||||
rlVertex3f((float)-halfSlices*spacing, 0.0f, (float)i*spacing);
|
||||
rlVertex3f((float)halfSlices*spacing, 0.0f, (float)i*spacing);
|
||||
}
|
||||
rlEnd();
|
||||
}
|
||||
|
||||
// Draw cube
|
||||
// NOTE: Cube position is the center position
|
||||
void DrawCube(Vector3 position, float width, float height, float length, Color color)
|
||||
{
|
||||
float x = 0.0f;
|
||||
float y = 0.0f;
|
||||
float z = 0.0f;
|
||||
|
||||
rlPushMatrix();
|
||||
|
||||
// NOTE: Be careful! Function order matters (rotate -> scale -> translate)
|
||||
rlTranslatef(position.x, position.y, position.z);
|
||||
//rlScalef(2.0f, 2.0f, 2.0f);
|
||||
//rlRotatef(45, 0, 1, 0);
|
||||
|
||||
rlBegin(RL_TRIANGLES);
|
||||
rlColor4ub(color.r, color.g, color.b, color.a);
|
||||
|
||||
// Front Face -----------------------------------------------------
|
||||
rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left
|
||||
rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right
|
||||
rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left
|
||||
|
||||
rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Right
|
||||
rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left
|
||||
rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right
|
||||
|
||||
// Back Face ------------------------------------------------------
|
||||
rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Left
|
||||
rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left
|
||||
rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right
|
||||
|
||||
rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right
|
||||
rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right
|
||||
rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left
|
||||
|
||||
// Top Face -------------------------------------------------------
|
||||
rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left
|
||||
rlVertex3f(x-width/2, y+height/2, z+length/2); // Bottom Left
|
||||
rlVertex3f(x+width/2, y+height/2, z+length/2); // Bottom Right
|
||||
|
||||
rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right
|
||||
rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left
|
||||
rlVertex3f(x+width/2, y+height/2, z+length/2); // Bottom Right
|
||||
|
||||
// Bottom Face ----------------------------------------------------
|
||||
rlVertex3f(x-width/2, y-height/2, z-length/2); // Top Left
|
||||
rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right
|
||||
rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left
|
||||
|
||||
rlVertex3f(x+width/2, y-height/2, z-length/2); // Top Right
|
||||
rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right
|
||||
rlVertex3f(x-width/2, y-height/2, z-length/2); // Top Left
|
||||
|
||||
// Right face -----------------------------------------------------
|
||||
rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right
|
||||
rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right
|
||||
rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Left
|
||||
|
||||
rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Left
|
||||
rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right
|
||||
rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Left
|
||||
|
||||
// Left Face ------------------------------------------------------
|
||||
rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Right
|
||||
rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left
|
||||
rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Right
|
||||
|
||||
rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left
|
||||
rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left
|
||||
rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Right
|
||||
rlEnd();
|
||||
rlPopMatrix();
|
||||
}
|
||||
|
||||
// Draw cube wires
|
||||
void DrawCubeWires(Vector3 position, float width, float height, float length, Color color)
|
||||
{
|
||||
float x = 0.0f;
|
||||
float y = 0.0f;
|
||||
float z = 0.0f;
|
||||
|
||||
rlPushMatrix();
|
||||
|
||||
rlTranslatef(position.x, position.y, position.z);
|
||||
//rlRotatef(45, 0, 1, 0);
|
||||
|
||||
rlBegin(RL_LINES);
|
||||
rlColor4ub(color.r, color.g, color.b, color.a);
|
||||
|
||||
// Front Face -----------------------------------------------------
|
||||
// Bottom Line
|
||||
rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left
|
||||
rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right
|
||||
|
||||
// Left Line
|
||||
rlVertex3f(x+width/2, y-height/2, z+length/2); // Bottom Right
|
||||
rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Right
|
||||
|
||||
// Top Line
|
||||
rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Right
|
||||
rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left
|
||||
|
||||
// Right Line
|
||||
rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left
|
||||
rlVertex3f(x-width/2, y-height/2, z+length/2); // Bottom Left
|
||||
|
||||
// Back Face ------------------------------------------------------
|
||||
// Bottom Line
|
||||
rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Left
|
||||
rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right
|
||||
|
||||
// Left Line
|
||||
rlVertex3f(x+width/2, y-height/2, z-length/2); // Bottom Right
|
||||
rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right
|
||||
|
||||
// Top Line
|
||||
rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right
|
||||
rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left
|
||||
|
||||
// Right Line
|
||||
rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left
|
||||
rlVertex3f(x-width/2, y-height/2, z-length/2); // Bottom Left
|
||||
|
||||
// Top Face -------------------------------------------------------
|
||||
// Left Line
|
||||
rlVertex3f(x-width/2, y+height/2, z+length/2); // Top Left Front
|
||||
rlVertex3f(x-width/2, y+height/2, z-length/2); // Top Left Back
|
||||
|
||||
// Right Line
|
||||
rlVertex3f(x+width/2, y+height/2, z+length/2); // Top Right Front
|
||||
rlVertex3f(x+width/2, y+height/2, z-length/2); // Top Right Back
|
||||
|
||||
// Bottom Face ---------------------------------------------------
|
||||
// Left Line
|
||||
rlVertex3f(x-width/2, y-height/2, z+length/2); // Top Left Front
|
||||
rlVertex3f(x-width/2, y-height/2, z-length/2); // Top Left Back
|
||||
|
||||
// Right Line
|
||||
rlVertex3f(x+width/2, y-height/2, z+length/2); // Top Right Front
|
||||
rlVertex3f(x+width/2, y-height/2, z-length/2); // Top Right Back
|
||||
rlEnd();
|
||||
rlPopMatrix();
|
||||
}
|
||||
Reference in New Issue
Block a user