///
// Draw triangles using the shader pair created in Init()
//
void gl_rect_draw(GL_STATE_T *p_state)
{
RectInstanceData *userData = p_state->user_data;
GLShapeInstanceData *shapeData = &userData->shape;
GLRectDisplayData *displayData = p_state->rectDisplayData;
mat4x4 projection;
mat4x4 modelView;
mat4x4 projection_scaled;
mat4x4 translation;
mat4x4 projection_final;
GLfloat vVertices[] = { 0.0f, 0.0f, 0.0f, // Position 0
0.0f, 1.0f, 0.0f, // Position 1
1.0f, 1.0f, 0.0f, // Position 2
1.0f, 0.0f, 0.0f, // Position 3
};
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
//GLushort indices[] = {1, 0, 3, 0, 2, 0, 1 };
// Use the program object
glUseProgram ( displayData->programObject );
// Load the vertex position
glVertexAttribPointer ( displayData->positionLoc, 3, GL_FLOAT,
GL_FALSE, 3 * sizeof(GLfloat), vVertices );
glEnableVertexAttribArray ( displayData->positionLoc );
mat4x4_identity(projection);
mat4x4_scale_aniso(projection_scaled, projection,
2.0/p_state->width,
-2.0/p_state->height,
1.0);
mat4x4_translate(translation, -1, 1, 0);
mat4x4_mul(projection_final, translation, projection_scaled);
mat4x4_translate(translation, shapeData->objectX, shapeData->objectY, 0.0);
mat4x4_identity(projection);
mat4x4_scale_aniso(projection_scaled, projection,
shapeData->objectWidth,
shapeData->objectHeight,
1.0);
mat4x4_mul(modelView, translation, projection_scaled);
glUniformMatrix4fv ( displayData->projectionLoc, 1, GL_FALSE, (GLfloat *)projection_final);
glUniformMatrix4fv ( displayData->modelViewLoc, 1, GL_FALSE, (GLfloat *)modelView);
glUniform3f ( displayData->colorLoc, userData->red, userData->green, userData->blue );
glDrawElements ( GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices );
//glDrawElements ( GL_TRIANGLE_STRIP, 6, GL_UNSIGNED_SHORT, indices );
}
void Camera_view_projection(Camera* const camera, mat4x4 matrix) {
mat4x4 position_matrix, orientation_matrix, scale_matrix;
mat4x4_translate(
position_matrix,
-camera->transform.position[0],
-camera->transform.position[1],
-camera->transform.position[2]
);
quat q;
quat_conj(q, camera->transform.orientation);
mat4x4_from_quat(orientation_matrix, q);
vec3 v = {
1.0f / camera->transform.scale[0],
1.0f / camera->transform.scale[1],
1.0f / camera->transform.scale[2]
};
mat4x4 m;
mat4x4_identity(m);
mat4x4_scale_aniso(scale_matrix, m, v[0], v[1], v[2]);
mat4x4_mul(matrix, scale_matrix, orientation_matrix);
mat4x4_mul(matrix, matrix, position_matrix);
mat4x4_mul(matrix, camera->projection, matrix);
}
void lndr_gen_jet_mv_matrix(Lander *lander)
{
if(lander->jetState == JS_OFF)
return;
float scale = 0;
if(lander->jetState == JS_INCREASING || lander->jetState == JS_DECREASING)
scale = lander->jetFrames / FLAME_GROW_RATE;
else if(lander->jetState == JS_ON)
{
if(lander->jetFrames < 10)
return;
lander->jetFrames = 0;
int rnd = rand() % 6 - 3;
scale = 1.0 + (0.07 * rnd);
}
mat4x4 ident, temp;
mat4x4_identity(ident);
mat4x4_translate_in_place(ident, 0, -0.3529412, 0);
mat4x4_scale_aniso(temp, ident, 1.0, scale, 1.0);
mat4x4_translate_in_place(temp, 0, 0.3529412, 0);
mat4x4_transpose(lander->jetMatrix, temp);
}
void lndr_gen_mv_matrix(Lander *lander)
{
mat4x4 ident, temp, trans;
mat4x4_identity(ident);
/*
float glx = 2 / glob_game.ppw;
float gly = 2 / glob_game.pph;
*/
/*
glx *= lander->x;
gly *= lander->y;
glx--;
gly--;
*/
float glx = lander->x;
float gly = lander->y;
mat4x4_scale_aniso(temp, ident, DEFAULT_SCALE, DEFAULT_SCALE, DEFAULT_SCALE);
mat4x4_rotate_Z(temp, temp, lander->rotation);
mat4x4_translate(trans, glx, gly, 0);
mat4x4_mul(ident, trans, temp);
mat4x4_transpose(lander->mvMatrix, ident);
}
static void
recalculate_matrices(struct ball *b)
{
mat4x4_identity(b->model_matrix);
mat4x4_translate_in_place(b->model_matrix, b->x, b->y, b->z);
mat4x4_scale_aniso(b->model_matrix, b->model_matrix, SCALE_FACTOR, SCALE_FACTOR, SCALE_FACTOR);
mat4x4_invert(b->normal_matrix, b->model_matrix);
mat4x4_transpose(b->normal_matrix, b->normal_matrix);
}
static inline void mvp_matrix(mat4x4 model_view_projection_matrix, Params params, mat4x4 view_projection_matrix)
{
mat4x4 model_matrix;
mat4x4_identity(model_matrix);
mat4x4 id;
mat4x4_identity(id);
mat4x4_translate(model_matrix, -params.anchor.x, -params.anchor.y, params.anchor.z);
mat4x4 scaled;
mat4x4_identity(scaled);
mat4x4_scale_aniso(scaled, scaled, params.scale.x, -params.scale.y, params.scale.z);
mat4x4 tmp;
mat4x4_dup(tmp, model_matrix);
mat4x4_mul(model_matrix, scaled, tmp);
mat4x4 rotate;
mat4x4_dup(rotate, id);
mat4x4_rotate_Z2(rotate, id, deg_to_radf(-params.rotation));
mat4x4_dup(tmp, model_matrix);
mat4x4_mul(model_matrix, rotate, tmp);
mat4x4_translate_independed(model_matrix, params.position.x, -params.position.y, params.position.z);
mat4x4 model_matrix3;
mat4x4_identity(model_matrix3);
mat4x4 mm;
mat4x4_mul(mm, model_matrix3, view_projection_matrix);
mat4x4_mul(model_view_projection_matrix, mm, model_matrix);
mat4x4_translate_independed(model_view_projection_matrix, 0, -y_offset/view_projection_matrix[3][3], 0);
}
///
// Draw triangles using the shader pair created in Init()
//
void gl_image_draw(GL_STATE_T *p_state)
{
ImageInstanceData *userData = p_state->user_data;
GLShapeInstanceData *shapeData = &userData->shape;
GLImageDisplayData *displayData = p_state->imageDisplayData;
mat4x4 projection;
mat4x4 modelView;
mat4x4 projection_scaled;
mat4x4 translation;
mat4x4 projection_final;
GLfloat vVertices[] = { 0.0f, 0.0f, 0.0f, // Position 0
0.0f, 0.0f, // TexCoord 0
0.0f, 1.0f, 0.0f, // Position 1
0.0f, 1.0f, // TexCoord 1
1.0f, 1.0f, 0.0f, // Position 2
1.0f, 1.0f, // TexCoord 2
1.0f, 0.0f, 0.0f, // Position 3
1.0f, 0.0f // TexCoord 3
};
GLfloat texCoords[8];
TexCoordsForRotation(shapeData->orientation, texCoords);
vVertices[3] = texCoords[0];
vVertices[4] = texCoords[1];
vVertices[8] = texCoords[2];
vVertices[9] = texCoords[3];
vVertices[13] = texCoords[4];
vVertices[14] = texCoords[5];
vVertices[18] = texCoords[6];
vVertices[19] = texCoords[7];
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
//GLushort indices[] = {1, 0, 3, 0, 2, 0, 1 };
// Use the program object
glUseProgram ( displayData->programObject );
// Load the vertex position
glVertexAttribPointer ( displayData->positionLoc, 3, GL_FLOAT,
GL_FALSE, 5 * sizeof(GLfloat), vVertices );
// Load the texture coordinate
glVertexAttribPointer ( displayData->texCoordLoc, 2, GL_FLOAT,
GL_FALSE, 5 * sizeof(GLfloat), &vVertices[3] );
glEnableVertexAttribArray ( displayData->positionLoc );
glEnableVertexAttribArray ( displayData->texCoordLoc );
// Bind the texture
glActiveTexture ( GL_TEXTURE0 );
glBindTexture ( GL_TEXTURE_2D, userData->textureId );
// Set the sampler texture unit to 0
glUniform1i ( displayData->samplerLoc, 0 );
mat4x4_identity(projection);
mat4x4_scale_aniso(projection_scaled, projection,
2.0/p_state->width,
-2.0/p_state->height,
1.0);
mat4x4_translate(translation, -1, 1, 0);
mat4x4_mul(projection_final, translation, projection_scaled);
mat4x4_translate(translation, shapeData->objectX, shapeData->objectY, 0.0);
mat4x4_identity(projection);
mat4x4_scale_aniso(projection_scaled, projection,
shapeData->objectWidth,
shapeData->objectHeight,
1.0);
mat4x4_mul(modelView, translation, projection_scaled);
glUniformMatrix4fv ( displayData->projectionLoc, 1, GL_FALSE, (GLfloat *)projection_final);
glUniformMatrix4fv ( displayData->modelViewLoc, 1, GL_FALSE, (GLfloat *)modelView);
glDrawElements ( GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices );
//glDrawElements ( GL_TRIANGLE_STRIP, 6, GL_UNSIGNED_SHORT, indices );
}
