v0.10.0 - Added text editor (which took me way too long) and too many other tweaks to name.

2025-05-04 15:16:54 +03:00
parent 6b8bee249a
commit 673a0b4a75
19 changed files with 997 additions and 384 deletions
@@ -0,0 +1,137 @@
+local raster = import("raster")
+local event = import("event")
+
+-- Initialize the 3D renderer for a spinning cube
+-- Using the raster library for drawing
+
+-- Screen dimensions
+local SCREEN_WIDTH, SCREEN_HEIGHT = component.invoke(component.list("gpu")(), "getResolution")
+SCREEN_WIDTH, SCREEN_HEIGHT = SCREEN_WIDTH * 2, SCREEN_HEIGHT * 4
+local CENTER_X = SCREEN_WIDTH / 2
+local CENTER_Y = SCREEN_HEIGHT / 2
+
+-- Cube properties
+local CUBE_SIZE = 10
+local increment = 0
+local WHITE = 0xFFFFFF
+local ROTATION_SPEED = 0.1
+
+-- 3D cube vertices (centered at origin)
+local vertices = {
+    {-CUBE_SIZE, -CUBE_SIZE, -CUBE_SIZE}, -- 0: left bottom back
+    {CUBE_SIZE, -CUBE_SIZE, -CUBE_SIZE},  -- 1: right bottom back
+    {CUBE_SIZE, CUBE_SIZE, -CUBE_SIZE},   -- 2: right top back
+    {-CUBE_SIZE, CUBE_SIZE, -CUBE_SIZE},  -- 3: left top back
+    {-CUBE_SIZE, -CUBE_SIZE, CUBE_SIZE},  -- 4: left bottom front
+    {CUBE_SIZE, -CUBE_SIZE, CUBE_SIZE},   -- 5: right bottom front
+    {CUBE_SIZE, CUBE_SIZE, CUBE_SIZE},    -- 6: right top front
+    {-CUBE_SIZE, CUBE_SIZE, CUBE_SIZE}    -- 7: left top front
+}
+
+-- Cube edges defined by vertex indices
+local edges = {
+    {0, 1}, {1, 2}, {2, 3}, {3, 0}, -- back face
+    {4, 5}, {5, 6}, {6, 7}, {7, 4}, -- front face
+    {0, 4}, {1, 5}, {2, 6}, {3, 7}  -- connecting edges
+}
+
+-- Projection parameters
+local FOV = 256         -- Field of view (distance from camera to screen)
+local Z_OFFSET = 300    -- Distance from camera to cube center
+
+-- Initialize rotation angles
+local angleX, angleY, angleZ = 0, 0, 0
+
+-- Matrix multiplication function (apply rotation to a 3D point)
+local function rotatePoint(x, y, z)
+    -- Rotation around X axis
+    local cosX, sinX = math.cos(angleX), math.sin(angleX)
+    local y1 = y * cosX - z * sinX
+    local z1 = y * sinX + z * cosX
+    
+    -- Rotation around Y axis
+    local cosY, sinY = math.cos(angleY), math.sin(angleY)
+    local x1 = x * cosY + z1 * sinY
+    local z2 = -x * sinY + z1 * cosY
+    
+    -- Rotation around Z axis
+    local cosZ, sinZ = math.cos(angleZ), math.sin(angleZ)
+    local x2 = x1 * cosZ - y1 * sinZ
+    local y2 = x1 * sinZ + y1 * cosZ
+    
+    return x2, y2, z2
+end
+
+-- Perspective projection function (3D to 2D)
+local function projectPoint(x, y, z)
+    -- Apply perspective projection
+    local scale = FOV / (z + Z_OFFSET)
+    local x2d = x * scale + CENTER_X
+    local y2d = y * scale + CENTER_Y
+    
+    return x2d, y2d
+end
+
+-- Render a single frame
+local function renderFrame()
+    increment = increment + 0.05
+    CUBE_SIZE = (math.sin(increment) + 1) * 25
+    vertices = {
+      {-CUBE_SIZE, -CUBE_SIZE, -CUBE_SIZE}, -- 0: left bottom back
+      {CUBE_SIZE, -CUBE_SIZE, -CUBE_SIZE},  -- 1: right bottom back
+      {CUBE_SIZE, CUBE_SIZE, -CUBE_SIZE},   -- 2: right top back
+      {-CUBE_SIZE, CUBE_SIZE, -CUBE_SIZE},  -- 3: left top back
+      {-CUBE_SIZE, -CUBE_SIZE, CUBE_SIZE},  -- 4: left bottom front
+      {CUBE_SIZE, -CUBE_SIZE, CUBE_SIZE},   -- 5: right bottom front
+      {CUBE_SIZE, CUBE_SIZE, CUBE_SIZE},    -- 6: right top front
+      {-CUBE_SIZE, CUBE_SIZE, CUBE_SIZE}    -- 7: left top front
+    }
+    -- Update rotation angles
+    raster.clear()
+    angleX = angleX + ROTATION_SPEED
+    angleY = angleY + ROTATION_SPEED * 0.7
+    angleZ = angleZ + ROTATION_SPEED * 0.5
+    
+    -- Project all vertices
+    local projectedPoints = {}
+    for i, vertex in ipairs(vertices) do
+        -- Rotate the point
+        local x, y, z = rotatePoint(vertex[1], vertex[2], vertex[3])
+        
+        -- Project the point to 2D
+        local x2d, y2d = projectPoint(x, y, z)
+        projectedPoints[i] = {x2d, y2d}
+    end
+    
+    -- Draw all edges
+    for _, edge in ipairs(edges) do
+        local p1 = projectedPoints[edge[1] + 1] -- +1 because Lua indices start at 1
+        local p2 = projectedPoints[edge[2] + 1]
+        
+        -- Draw the line
+        raster.drawLine(p1[1], p1[2], p2[1], p2[2], WHITE)
+    end
+    
+    -- Render the frame
+    raster.update()
+end
+
+-- Main program
+function main()
+    -- Initialize raster engine
+    raster.init()
+    
+    -- Main loop (assume this is called repeatedly by the host environment)
+    while true do
+      renderFrame()
+      if event.pull("key_down", 0) then
+        raster.free()
+        break
+      end
+    end
+    -- Return a reference to renderFrame so it can be called for animation
+    return renderFrame
+end
+
+-- Start the program
+return main()