summaryrefslogtreecommitdiff
path: root/demo
diff options
context:
space:
mode:
authorsanine <sanine.not@pm.me>2022-09-27 21:24:46 -0500
committersanine <sanine.not@pm.me>2022-09-27 21:24:46 -0500
commit40e4c6890f3f94e360b5e0249ad0045f2133b390 (patch)
tree7a213b03d9f704b8df47e9cdc19679272646aa98 /demo
parent9b42315ef051745b94eeb31d4680f821779b50a2 (diff)
add basic mesh loading demo
Diffstat (limited to 'demo')
-rw-r--r--demo/honey.lua83
1 files changed, 59 insertions, 24 deletions
diff --git a/demo/honey.lua b/demo/honey.lua
index 28cd987..113d845 100644
--- a/demo/honey.lua
+++ b/demo/honey.lua
@@ -21,6 +21,7 @@ window.setHint(window.hintType.openGlProfile, window.profileType.openGlCoreProfi
local w = window.create(640, 480, 'hello, world!')
window.makeContextCurrent(w)
gl.InitGlad()
+gl.Enable(gl.DEPTH_TEST)
window.setFramebufferSizeCallback(w, function(_, width, height)
print(string.format("resize: (%d, %d)", width, height))
@@ -33,21 +34,17 @@ end)
local vertexShaderSource = [[
#version 330 core
layout (location = 0) in vec3 aPos;
-layout (location = 1) in vec3 aColor;
-layout (location = 2) in vec2 aTexCoord;
+layout (location = 1) in vec2 aTexCoord;
uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;
-
-out vec3 ourColor;
out vec2 TexCoord;
void main()
{
gl_Position = projection * view * model * vec4(aPos, 1.0);
- ourColor = aColor;
TexCoord = aTexCoord;
}
]]
@@ -56,7 +53,6 @@ local fragmentShaderSource = [[
#version 330 core
out vec4 FragColor;
-in vec3 ourColor;
in vec2 TexCoord;
uniform sampler2D ourTexture;
@@ -90,11 +86,11 @@ gl.DeleteShader(fragmentShader)
--====== set up mesh data manually ======--
local vertices = {
--- positions colors uvs
- 0.5, 0.5, 0.0, 1.0, 0.0, 0.0, 1.0, 1.0, -- top right
- 0.5, -0.5, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0, -- bottom right
- -0.5, -0.5, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, -- bottom let
- -0.5, 0.5, 0.0, 1.0, 1.0, 0.0, 0.0, 1.0 -- top let
+-- positions uvs
+ 0.5, 0.5, 0.0, 1.0, 1.0, -- top right
+ 0.5, -0.5, 0.0, 1.0, 0.0, -- bottom right
+ -0.5, -0.5, 0.0, 0.0, 0.0, -- bottom let
+ -0.5, 0.5, 0.0, 0.0, 1.0 -- top let
}
local indices = {
0, 1, 3, -- first triangle
@@ -115,24 +111,55 @@ gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, elementBuffer)
gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.UNSIGNED_INT, indices, gl.STATIC_DRAW)
-- position
-gl.VertexAttribPointer(0, 3, false, 8, 0)
+gl.VertexAttribPointer(0, 3, false, 5, 0)
gl.EnableVertexAttribArray(0)
--- color
-gl.VertexAttribPointer(1, 3, false, 8, 3)
-gl.EnableVertexAttribArray(1)
-
-- uv
-gl.VertexAttribPointer(2, 2, false, 8, 6)
-gl.EnableVertexAttribArray(2)
+gl.VertexAttribPointer(1, 2, false, 5, 3)
+gl.EnableVertexAttribArray(1)
--===== load mesh from file =====--
local scene = honey.import.importFile('suzanne.dae')
-print(#scene.meshes)
+local mesh = scene.meshes[1]
local suzanne = {}
-suzanne.vertexData = {}
+suzanne.vertices = {}
+print('mesh.vertices', #mesh.vertices)
+for i=1,#mesh.vertices do
+ local position = mesh.vertices[i]
+ local uv = mesh.uvs[1][i]
+ table.insert(suzanne.vertices, position.x)
+ table.insert(suzanne.vertices, position.y)
+ table.insert(suzanne.vertices, position.z)
+ table.insert(suzanne.vertices, uv.x)
+ table.insert(suzanne.vertices, uv.y)
+end
+suzanne.indices = {}
+for _, face in ipairs(mesh.faces) do
+ assert(#face == 3)
+ for _, i in ipairs(face) do
+ table.insert(suzanne.indices, i)
+ end
+end
+print('mesh.faces', #mesh.faces)
+print('suzanne.indices', #suzanne.indices)
+
+suzanne.vertexArr = gl.GenVertexArrays()
+suzanne.vertexBuf = gl.GenBuffers()
+suzanne.elementBuf = gl.GenBuffers()
+
+gl.BindVertexArray(suzanne.vertexArr)
+gl.BindBuffer(gl.ARRAY_BUFFER, suzanne.vertexBuf)
+gl.BufferData(gl.ARRAY_BUFFER, gl.FLOAT, suzanne.vertices, gl.STATIC_DRAW)
+
+gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, suzanne.elementBuf)
+gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.UNSIGNED_INT, suzanne.indices, gl.STATIC_DRAW)
+
+gl.VertexAttribPointer(0, 3, false, 5, 0)
+gl.EnableVertexAttribArray(0)
+gl.VertexAttribPointer(1, 2, false, 5, 3)
+gl.EnableVertexAttribArray(1)
--====== load texture ======--
@@ -169,7 +196,7 @@ local axis = honey.glm.vec3()
honey.glm.vec3_set(axis, 0, 1.0)
honey.glm.vec3_set(axis, 1, 0.0)
honey.glm.vec3_set(axis, 2, 0.0)
-honey.glm.rotate(model, math.rad(-55), axis)
+honey.glm.rotate(model, math.rad(-90), axis)
local view = honey.glm.mat4()
honey.glm.mat4_identity(view)
@@ -188,8 +215,10 @@ honey.glm.perspective(math.rad(45), 800/600, 0.1, 100, projection)
local transform = honey.glm.mat4()
while not window.shouldClose(w) do
+ local time = window.getTime()
+
gl.ClearColor(0.2, 0.3, 0.3, 1.0)
- gl.Clear(gl.COLOR_BUFFER_BIT)
+ gl.Clear(gl.COLOR_BUFFER_BIT + gl.DEPTH_BUFFER_BIT)
gl.ActiveTexture(0)
gl.BindTexture(gl.TEXTURE_2D, texture)
@@ -200,12 +229,18 @@ while not window.shouldClose(w) do
local viewL = gl.GetUniformLocation(shader, 'view')
local projectionL = gl.GetUniformLocation(shader, 'projection')
+ honey.glm.mat4_identity(model)
+ honey.glm.rotate(model, math.pi*time, axis)
+
gl.UniformMatrix4fv(modelL, false, model)
gl.UniformMatrix4fv(viewL, false, view)
gl.UniformMatrix4fv(projectionL, false, projection)
- gl.BindVertexArray(vertexArray)
- gl.DrawElements(gl.TRIANGLES, 6, gl.UNSIGNED_INT, 0)
+ --gl.BindVertexArray(vertexArray)
+ --gl.DrawElements(gl.TRIANGLES, 6, gl.UNSIGNED_INT, 0)
+
+ gl.BindVertexArray(suzanne.vertexArr)
+ gl.DrawElements(gl.TRIANGLES, 3*#mesh.faces, gl.UNSIGNED_INT, 0)
window.swapBuffers(w)
window.pollEvents()